The (ACP) is the largest medical specialty organization in the United States, representing over 162,000 internal medicine physicians, residents, medical students, and affiliated healthcare professionals. Founded in 1915 and headquartered in Philadelphia, Pennsylvania, the ACP is dedicated to advancing the practice of , a field focused on the diagnosis, treatment, and prevention of adult diseases [1]. Its mission centers on enhancing healthcare quality by promoting excellence, professionalism, and evidence-based practice through clinical guidelines, continuing medical education (CME), and robust advocacy for health policy reform [2]. The ACP plays a pivotal role in shaping national standards for clinical care, notably through its rigorous development of clinical practice guidelines using the GRADE framework, and by publishing influential peer-reviewed research in its flagship journal, [3]. It supports lifelong learning via programs such as the Medical Knowledge Self-Assessment Program (MKSAP) and offers CME and Maintenance of Certification (MOC) resources aligned with the American Board of Internal Medicine (ABIM) requirements [4]. The organization also champions health equity, physician well-being, and payment reform, advocating for policies that reduce administrative burdens and expand patient access to care through initiatives like the "Patients Before Paperwork" campaign. With a global presence through international chapters and collaborations with entities such as the World Health Organization (WHO), the ACP continues to influence both U.S. and international health systems [5]. Its fellowship designation, FACP, recognizes members who demonstrate leadership and sustained contributions to the field, further reinforcing its role in cultivating professional excellence within the medical community.
History and Founding
The (ACP) was founded on May 11, 1915, in response to a critical need for reform and professionalization within American medicine during the early 20th century. Its establishment marked a pivotal moment in the development of internal medicine as a distinct, scientifically grounded medical specialty in the United States. The organization emerged from a broader movement to elevate medical standards, promote rigorous clinical education, and create a national community of physicians dedicated to excellence in the diagnosis and treatment of adult diseases [1]. The ACP was formally incorporated in Philadelphia, Pennsylvania, where its headquarters remains today, symbolizing its enduring presence at the heart of American medical leadership [7].
Founding Motivations and Historical Context
The impetus for founding the ACP was deeply rooted in the widespread recognition of deficiencies in American medical practice and education prior to the 1910s. At the time, the medical profession was fragmented, with hundreds of proprietary medical schools offering substandard training—some requiring only a single year of study—and issuing degrees with minimal oversight. This lack of uniformity led to an oversupply of physicians with inconsistent qualifications and eroded public confidence in the profession [8]. A turning point came with the publication of the in 1910, a landmark evaluation of medical education in North America that exposed systemic flaws and called for sweeping reforms. The report advocated for university-affiliated medical schools grounded in scientific principles, rigorous curricula, and clinical training, catalyzing a national movement toward medical professionalization [9].
In this climate of reform, physicians specializing in internal medicine sought to distinguish themselves from general practitioners and establish their field as a discipline rooted in scientific inquiry. Inspired by the model of the Royal College of Physicians in London, which Dr. observed during a visit in 1913, a group of visionary internists aimed to create a similar learned society in the U.S. [10]. Stern became the driving force behind the ACP’s founding, envisioning an organization that would promote high standards, foster scholarly exchange, and advance the science of internal medicine. The American Congress on Internal Medicine, convened on January 8, 1915, served as a direct precursor to the ACP, bringing together physicians committed to elevating the specialty [11]. Building on this momentum, the ACP was formally established on May 11, 1915, with the mission of promoting excellence in internal medicine through education, collaboration, and the dissemination of medical knowledge [11].
Differentiation from Other Medical Organizations
From its inception, the ACP distinguished itself from broader medical associations such as the (AMA), which had been founded in 1847 to represent physicians across all specialties. While the AMA focused on public health policy, medical ethics, and political advocacy, the ACP carved out a unique niche by concentrating exclusively on internal medicine [13]. The ACP functioned not as a trade association but as a professional college—a scholarly society modeled after European royal colleges—dedicated to scientific exchange, postgraduate education, and the cultivation of professional fellowship among internists [14].
This specialization allowed the ACP to focus on advancing clinical rigor and academic excellence within its field. Unlike the AMA’s inclusive membership model, early ACP membership was selective, emphasizing experience and commitment to internal medicine. Provisions were made for physicians with at least ten years of practice, reflecting a dedication to seniority, expertise, and professional maturity [11]. The organization’s early activities centered on scholarly communication rather than political lobbying, laying the foundation for its future role as a leader in medical education and clinical standards.
Key Founding Figures and Institutional Development
The ACP’s founding was shaped by several influential leaders whose vision and leadership were instrumental in its institutional development. Dr. is widely recognized as the founder, having conceived the idea after his exposure to the Royal College of Physicians in London. His leadership provided the philosophical and organizational blueprint for the ACP as a national body committed to professionalism and scientific medicine [16]. The ACP’s first president, Dr. (1915–1921), played a crucial role in its early institutionalization, guiding its governance, expanding its membership, and solidifying its identity as a distinct entity within American medicine [10].
Another transformative figure was Edward R. Loveland, who served as the ACP’s first Executive Secretary from 1926 to 1959. Under his stewardship, the organization evolved from a small society into a nationally influential institution with a professional infrastructure. Loveland oversaw the expansion of the ACP’s headquarters, the development of its publications, and the growth of its educational programs, including the launch of Annals of Internal Medicine in 1927 [18]. This journal became a premier vehicle for publishing clinical research, case studies, and expert commentary, significantly raising the standard of medical knowledge and practice across the country [19].
Early Contributions to Medical Professionalism
In its formative decades, the ACP played a foundational role in shaping internal medicine as a respected medical specialty. Although it did not initially administer board certification—this function was later assumed by the (ABIM) in 1936—the ACP helped institutionalize the professional identity of internists through scholarly meetings, publications, and the promotion of high clinical standards [20]. By fostering a national network of specialists committed to lifelong learning and ethical practice, the ACP contributed to the broader shift from a fragmented, trade-like medical system to a structured, academically rigorous profession dedicated to scientific advancement and patient care [21]. Its early emphasis on evidence-based practice, professional fellowship, and educational excellence laid the groundwork for its enduring influence in shaping the standards of internal medicine in the United States.
Mission and Core Values
The American College of Physicians (ACP) is guided by a mission to enhance the quality and effectiveness of healthcare in the United States by promoting excellence, professionalism, and evidence-based practice within the field of [2]. This mission reflects a deep commitment to advancing clinical standards, supporting physician education and professional development, and advocating for responsible health policies that improve patient care [23]. Central to this vision is the creation of a healthcare delivery system that is efficient, compassionate, and equitable—prioritizing both the needs of patients and the professional integrity of physicians [2].
Core Mission: Advancing Excellence in Internal Medicine
At its foundation, the ACP’s mission centers on elevating the standards of practice in internal medicine, a specialty dedicated to the diagnosis, treatment, and prevention of adult diseases [1]. The organization seeks to cultivate a community of physicians who are not only clinically proficient but also ethically grounded and committed to lifelong learning. To achieve this, the ACP provides a comprehensive suite of resources, including , continuing medical education (CME), and policy advocacy, all designed to support internists in delivering high-quality, patient-centered care [26].
A key component of the ACP’s mission is its role in shaping national and international standards for clinical care. Through its rigorous development of guidelines using the GRADE framework, the ACP ensures that recommendations are based on the best available scientific evidence, transparent methodology, and consideration of patient values and health equity [27]. These guidelines influence both individual practice and institutional policies across academic and community settings [28].
Commitment to Professionalism and Ethical Standards
Integral to the ACP’s mission is the promotion of medical professionalism and ethical conduct. The organization has played a leading role in defining the ethical responsibilities of physicians through foundational documents such as the Physician Charter on Professionalism, co-authored with the American Board of Internal Medicine (ABIM) and the European Federation of Internal Medicine [29]. This charter articulates core principles including patient welfare, patient autonomy, and social justice—values that continue to guide the ACP’s policy positions and educational initiatives.
The ACP also upholds these standards through its ACP Ethics Manual, Seventh Edition, which provides comprehensive guidance on ethical issues in clinical practice, including conflicts of interest, physician employment models, and the integration of emerging technologies like in healthcare [30]. By emphasizing transparency, equity, and patient-centered decision-making, the ACP reinforces the dual obligation of physicians to individual patients and to society at large [31].
Advocacy for Health Equity and Social Justice
A defining element of the ACP’s core values is its dedication to health equity and the elimination of disparities in healthcare. The organization recognizes that systemic factors such as racism, socioeconomic status, and access to social determinants of health (SDOH)—including housing, education, and employment—profoundly impact patient outcomes [32]. In response, the ACP has developed a comprehensive policy framework to address these inequities, calling for cross-sectoral reforms in education, criminal justice, and workforce diversity to improve health outcomes for marginalized populations [33].
This commitment extends to vulnerable populations, including unhoused individuals, rural communities, immigrants, and those with limited access to reproductive or mental health services [34]. The ACP advocates for expanded federal funding, integrated care models, and policy reforms that reduce both financial and non-financial barriers to care. It also calls for physician payment systems to be restructured to account for social risk factors, ensuring that providers serving disadvantaged populations are not penalized under current value-based models [35].
Support for Lifelong Learning and Professional Development
The ACP’s mission is realized through its robust support for lifelong learning and professional growth. It offers a wide array of educational tools designed to meet the needs of physicians at every career stage, from medical students to seasoned practitioners. The Medical Knowledge Self-Assessment Program (MKSAP) remains a cornerstone of this effort, providing internists with a structured, self-directed approach to maintaining clinical knowledge and preparing for board certification and Maintenance of Certification (MOC) [4]. MKSAP aligns with the content blueprints of the ABIM and supports continuous learning through evidence-based assessments and detailed feedback [37].
In addition to MKSAP, the ACP delivers CME through live and virtual events, including the annual , which features expert-led sessions, clinical skills workshops, and pre-meeting courses [38]. These offerings are accredited for both CME and MOC credit, enabling physicians to meet certification requirements while staying current with advances in medicine [39].
For clinician-educators, the ACP provides specialized resources such as the ACP Board Prep Curriculum for Educators and teaching tools aligned with the Accreditation Council for Graduate Medical Education (ACGME) milestones, supporting the development of future generations of internists [40]. These efforts ensure that excellence in internal medicine is not only maintained but actively cultivated across academic and community practice environments.
Leadership in Health Policy and Systemic Reform
The ACP’s mission extends beyond clinical and educational domains into the realm of health policy, where it advocates for systemic reforms that align with its core values. It actively engages with federal agencies such as the Centers for Medicare & Medicaid Services (CMS) and Congress to influence legislation on issues including payment reform, prior authorization, telehealth, and prescription drug affordability [41]. Through initiatives like the “Patients Before Paperwork” campaign, the ACP works to reduce administrative burdens that detract from patient care and contribute to physician burnout [42].
The organization supports the transition from volume-based to models, advocating for alternative payment models (APMs) that reward comprehensive, team-based care and are accessible to small and independent practices [43]. It also calls for a unified national approach to performance measurement focused on common clinical conditions, aiming to reduce clinician burden while improving care quality [44].
Through its multifaceted mission and unwavering core values, the ACP continues to serve as a leading voice in internal medicine, shaping the future of healthcare through excellence, equity, and ethical leadership.
Membership and Fellowship
The American College of Physicians (ACP) offers a comprehensive and tiered membership structure designed to support individuals across all stages of their careers in internal medicine, from medical students to seasoned physicians, as well as international practitioners and non-physician healthcare professionals. With over 162,000 members, the ACP fosters a diverse and inclusive community dedicated to advancing the field of through education, advocacy, and professional development [21]. Membership categories are tailored to meet the unique needs of each group, providing access to clinical resources, continuing medical education (CME), networking opportunities, and leadership development programs.
Types of Membership
Physician Membership
Physician membership is open to licensed or professionals who specialize in internal medicine or its subspecialties, including . Applicants must hold a valid medical license in good standing if actively practicing and agree to uphold the ACP’s ethical standards [46]. This category supports practicing internists with tools for clinical decision-making, such as access to , an evidence-based point-of-care resource, and participation in quality improvement initiatives. Dues are structured based on the number of years since medical school graduation, ensuring affordability and inclusivity across career stages.
Fellow of the American College of Physicians (FACP)
The designation of FACP is an honorary recognition awarded to physician members who demonstrate exceptional leadership, scholarship, and sustained contributions to the field of internal medicine. To be considered for fellowship, candidates must meet specific criteria, including being in good standing with the ACP for at least three of the past four years and holding initial board certification in internal medicine or neurology [47].
Applicants must also demonstrate significant activity in at least three of the four “pillars” of fellowship: clinical practice, teaching, research, and leadership. These contributions are evaluated through a peer-reviewed process, ensuring that the FACP designation reflects excellence and professional impact. Fellows are recognized at national events and are eligible for leadership roles within the organization, including service on the or [48]. The FACP credential is widely respected in the medical community and signifies a commitment to the highest standards of medical professionalism.
Residents and Fellows-in-Training Membership
Residents and fellows enrolled in Accreditation Council for Graduate Medical Education (ACGME)-accredited internal medicine residency or subspecialty fellowship programs in the U.S. or Canada are eligible for this membership category. It offers reduced dues and provides critical support during training, including access to the Medical Knowledge Self-Assessment Program (MKSAP) for trainees, board review courses, and career development tools [49]. The ACP also offers the Guided Fellowship Program, which mentors trainees through the process of applying for FACP status, helping them build a strong foundation for future leadership and academic achievement.
Medical Student Membership
Medical students at accredited institutions in the U.S. and Canada can join the ACP at no cost. This membership introduces students to the field of internal medicine early in their careers, offering access to educational resources, mentorship opportunities, and networking with practicing physicians. Students benefit from early exposure to , career planning tools, and information about residency applications and training pathways [50]. By engaging students early, the ACP supports the recruitment and development of the next generation of internists and promotes lifelong involvement in the specialty.
International Membership
The ACP includes over 23,500 international members from 172 countries, reflecting its global reach and commitment to advancing internal medicine worldwide [51]. International membership is available to physicians, residents, medical students, and non-physician affiliates practicing outside the U.S. and Canada. These members gain access to the same high-quality clinical resources, educational content, and advocacy initiatives as domestic members. The ACP supports international engagement through regional chapters in countries such as India, Japan, Brazil, and Saudi Arabia, fostering local leadership and professional development [52]. The Global Engagement Committee oversees these efforts, ensuring that the needs of international members are integrated into the ACP’s strategic priorities.
Non-Physician Affiliate Membership
Non-physician healthcare professionals, including , , administrators, and other allied health workers involved in internal medicine, are eligible for affiliate membership. This category recognizes the essential role of interprofessional teams in delivering high-quality patient care [53]. Affiliates can participate in educational programs, advocacy initiatives, and quality improvement projects, contributing to the ACP’s mission of enhancing healthcare delivery systems. This inclusive approach strengthens collaboration across disciplines and supports the evolution of team-based care models such as the Patient-Centered Medical Home (PCMH).
Benefits and Professional Development
All ACP members, regardless of category, receive a wide array of benefits designed to support clinical excellence and career advancement. These include discounted registration for the annual , access to CME and Maintenance of Certification (MOC) activities, and exclusive savings on educational products like MKSAP and POCUS courses [54]. Members also have access to insurance options, including life, disability, and practice liability coverage, through trusted partner providers [55].
Through its structured membership and fellowship pathways, the ACP not only supports individual career development but also strengthens the collective voice of internal medicine professionals in shaping health policy, advancing clinical standards, and promoting equity in healthcare delivery.
Clinical Practice Guidelines and Research
The American College of Physicians (ACP) plays a central role in shaping clinical practice and advancing medical knowledge through the development of rigorous, evidence-based clinical practice guidelines and its support for high-impact research. These efforts are instrumental in standardizing care, reducing practice variation, and promoting high-value, patient-centered medicine across the United States and globally. The ACP’s work in this domain is underpinned by methodological rigor, transparency, and a commitment to integrating patient values, cost considerations, and health equity into clinical recommendations.
Development and Methodology of Clinical Practice Guidelines
The ACP develops clinical practice guidelines through a systematic, transparent process led by its Clinical Guidelines Committee (CGC), which comprises internal medicine specialists and methodologists. This process adheres to standards set by the National Academy of Medicine and the Guidelines International Network to ensure scientific validity and trustworthiness [56]. A cornerstone of the ACP’s approach is its adoption of the GRADE (Grading of Recommendations, Assessment, Development and Evaluation)|GRADE framework, which enables the committee to assess the quality of evidence (classified as high, moderate, low, or very low) and determine the strength of recommendations (strong or conditional) [27]. This methodology ensures that recommendations are grounded in the best available scientific evidence, primarily derived from randomized controlled trials and high-quality observational studies.
A critical component of the guideline development process is the rigorous management of conflicts of interest. All CGC members and contributors are required to disclose financial and intellectual interests from the past three years. A dedicated Disclosure and Conflicts of Interest (DOI-COI) Review and Management Panel evaluates these disclosures and recuses individuals with high-level conflicts from authorship and voting, preserving the integrity of the recommendations [58][59]. The ACP also emphasizes stakeholder engagement, incorporating patient perspectives, values, and preferences, as well as considerations of comorbidities, costs, and health equity into its guidelines [60]. This patient-centered approach enhances the applicability and relevance of its recommendations in real-world clinical settings.
Scope and Impact of Clinical Guidelines
The ACP’s clinical guidelines cover a broad spectrum of conditions central to internal medicine, including hypertension, diabetes, depression, and preventive care. Recent guidelines have addressed the pharmacologic treatment of episodic migraines [61], the management of acute and recurrent gout [62], and newer pharmacological treatments for adults with type 2 diabetes [63]. The organization also issues guidance statements and best practice advice on emerging topics, such as the integration of behavioral health into primary care and care transitions, to address evolving clinical challenges [64].
To enhance implementation, the ACP has developed a framework to standardize the use of economic evidence in guideline development, ensuring that cost-effectiveness and health system impact are systematically considered [65]. This supports clinicians in delivering high-value care while navigating resource constraints. The ACP also promotes the use of visual clinical guidelines and decision-support tools to facilitate adoption in both academic and community practice settings [66].
Role of Annals of Internal Medicine in Research Dissemination
The ACP’s flagship journal, , is a premier peer-reviewed publication that plays a vital role in advancing medical research and education. As the most cited journal in general internal medicine, with a 2022 impact factor of 39.2, Annals publishes original research, systematic reviews, practice-changing guidelines, and policy analyses that directly inform clinical decision-making [67][68]. The journal frequently features ACP clinical guidelines and synopses of international guidelines, such as the 2024 KDIGO guideline on chronic kidney disease, ensuring that internists have access to synthesized, up-to-date evidence [69]. It also publishes “living guidelines” that are updated as new evidence emerges, such as those on migraine management, enhancing their timeliness and relevance [70].
Beyond disseminating guidelines, Annals supports medical education through annual “Updates in Internal Medicine” and other educational supplements that summarize key advances for practicing clinicians [71]. Its rigorous peer-review process and broad readership—particularly among ACP members—ensure that its content influences both individual practice and institutional policies. The journal also publishes CME-accredited activities, including interactive tools like , which simulate complex clinical scenarios to assess diagnostic and management skills [72].
Influence on National Standards and Practice Implementation
The ACP contributes significantly to setting national standards for excellence in clinical care. Its 2025 position paper, Identifying Core Clinical Topics and Recommending Core Performance Measures for Internal Medicine Physicians, proposes standardized metrics to assess care quality and aims to unify clinical practice across diverse healthcare systems [73]. This work supports value-based care models and reduces unwarranted variation in treatment.
In academic medical centers, ACP guidelines are integrated into teaching curricula, clinical pathways, and quality improvement initiatives, shaping the training of future internists. In community practice settings, the ACP facilitates guideline adoption through accessible resources such as the Medical Knowledge Self-Assessment Program (MKSAP) and continuing medical education (CME) offerings, which help practicing physicians stay current with best practices [37]. Research protocols, such as the IMPACt-LBP trial, are evaluating the real-world implementation of ACP low back pain guidelines, further validating their impact on patient outcomes [75]. Through these multifaceted efforts, the ACP ensures that evidence-based medicine is translated into improved care for patients across the U.S. healthcare system.
Medical Education and Professional Development
The American College of Physicians (ACP) plays a foundational role in advancing the lifelong learning and professional growth of internal medicine physicians, residents, medical students, and affiliated healthcare professionals. Through a comprehensive portfolio of educational programs, self-assessment tools, and resources for clinician-educators, the ACP supports excellence in medical knowledge, clinical skills, and teaching effectiveness across all career stages.
Continuing Medical Education and Lifelong Learning
The ACP is a national leader in continuing medical education (CME), offering a wide array of accredited learning opportunities designed to keep internists current with rapidly evolving medical knowledge and best practices. Its CME programs are accessible through multiple modalities, including live events, virtual courses, and on-demand digital content, ensuring flexibility for busy practitioners. The annual Internal Medicine Meeting is a cornerstone of this effort, featuring expert-led scientific sessions, hands-on clinical skills workshops, and pre-meeting courses that provide both CME and Maintenance of Certification (MOC) credits [38]. For those unable to attend in person, the ACP offers extensive recorded content through its Online Learning Center, including the comprehensive "The Works" package, which delivers over 240 hours of educational sessions from recent national meetings [77].
In addition to live and recorded courses, the ACP curates specialty-focused video packages in areas such as , , and chronic disease management, enabling physicians to deepen their expertise in specific domains [78]. These offerings are grounded in evidence-based medicine and are designed to enhance diagnostic accuracy, therapeutic decision-making, and patient outcomes in both academic and community practice settings.
Medical Knowledge Self-Assessment Program (MKSAP)
A cornerstone of the ACP’s educational mission is the Medical Knowledge Self-Assessment Program (MKSAP), first launched in 1966 as a pioneering tool for self-directed learning and board preparation [79]. MKSAP has evolved into a comprehensive learning system that aligns with the content blueprints of the American Board of Internal Medicine (ABIM) and supports both initial certification and MOC requirements. The latest edition, MKSAP 19, provides thousands of peer-reviewed questions with detailed explanations, covering core and emerging topics in internal medicine [37]. Completion of MKSAP allows physicians to earn up to 135 AMA PRA Category 1 Credits™ and corresponding ABIM MOC points, reinforcing its role as a vital resource for professional accountability [81].
In 2025, the ACP introduced ACP MKSAP CORE, a validated assessment feature that enables physicians to demonstrate continuous learning and professional development over time [82]. This innovation reflects a broader shift toward longitudinal assessment models that emphasize ongoing competency rather than high-stakes examinations. The ACP has also collaborated with the ABIM to allow physicians to import MKSAP assessment results directly into the ABIM platform, facilitating the creation of personalized learning plans and streamlining the MOC process [83].
Support for Clinician-Educators and Trainees
The ACP provides robust resources for clinician-educators, recognizing their critical role in shaping the next generation of internists. The ACP Board Prep Curriculum for Educators offers a structured framework for teaching residents and fellows, integrating MKSAP content, case-based discussions, and performance tracking tools to align with ABIM exam requirements [84]. This curriculum supports residency programs in fostering a culture of continuous assessment and improvement, enhancing both educational quality and resident preparedness.
For medical educators, the ACP offers dedicated Medical Educator Resources, including coaching guides, curriculum development tools, and frameworks such as the Clinician Educator Milestones—developed in collaboration with the Accreditation Council for Graduate Medical Education (ACGME)—which outline progressive competencies in teaching, leadership, and scholarship [40], [86]. These resources empower educators to assess their own development and mentor trainees effectively, promoting excellence in academic medicine.
Medical students and trainees benefit from tailored ACP offerings, including free membership for students, which provides early access to educational materials, networking opportunities, and career development tools [50]. The Guided Fellowship Program supports residents in preparing for advancement to Fellow of the American College of Physicians (FACP) status, fostering leadership and professional engagement from the outset of their careers [49].
Integration of Clinical Guidelines and Evidence-Based Practice
The ACP reinforces medical education through the integration of its evidence-based clinical guidelines into daily practice and teaching. Published in Annals of Internal Medicine, these guidelines are developed using the rigorous GRADE framework and are widely adopted in both academic and community settings [27]. The ACP also offers interactive CME modules such as Annals Virtual Patients, which simulate complex clinical scenarios to assess diagnostic and management skills while awarding CME and MOC credits [72]. These tools help clinicians apply guideline recommendations in real-world contexts, bridging the gap between research and practice.
Through its comprehensive educational ecosystem—spanning self-assessment, live learning, educator support, and evidence-based resources—the ACP ensures that internal medicine professionals can maintain clinical excellence, adapt to new challenges, and contribute meaningfully to the advancement of patient care throughout their careers.
Advocacy and Health Policy
The American College of Physicians (ACP) plays a central role in shaping national health policy through evidence-based advocacy, strategic engagement with federal agencies, and leadership on critical issues affecting internal medicine practice and patient care. As a leading voice for internists, the ACP influences legislative and regulatory decisions by translating clinical expertise into actionable policy recommendations that promote high-value, equitable, and patient-centered care.
Federal Advocacy and Legislative Engagement
ACP actively participates in federal policymaking through direct testimony, formal rule comments, and sustained lobbying efforts. The organization regularly submits expert statements to congressional committees, including the Senate Finance Committee and House Energy and Commerce Committee, on matters such as the President’s healthcare agenda, Medicare payment reform, and prescription drug pricing [91]. In 2025, ACP provided testimony advocating for the repeal of the Sustainable Growth Rate (SGR) formula and the establishment of sustainable payment models for primary care, contributing to broader legislative reforms under the Medicare Access and CHIP Reauthorization Act (MACRA) [92].
Through its Advocates for Internal Medicine Network (AIMn) and Legislative Action Center, ACP mobilizes members to engage with lawmakers and amplify the profession’s policy priorities [93]. This grassroots advocacy has supported efforts to pass legislation such as the Pay PCPs Act (S. 4338), which aims to stabilize and enhance Medicare payments to primary care providers, ensuring financial sustainability for practices delivering comprehensive care [94].
Payment Reform and Value-Based Care
A cornerstone of ACP’s advocacy is the transformation of physician payment systems to support value-based care and reduce reliance on fee-for-service incentives. The organization champions alternative payment models (APMs) that reward care coordination, chronic disease management, and preventive services, particularly within Medicare’s Quality Payment Program (QPP) [43]. ACP supports models such as the Accountable Care Organization (ACO) Primary Care Flex Model, which aligns financial incentives with team-based, proactive care delivery [96].
ACP advocates for equitable reimbursement of evaluation and management (E/M) services, care coordination, and cognitive specialties, which are often undervalued in current payment structures. It has welcomed recent updates to the Medicare Physician Fee Schedule that better reflect the complexity of internal medicine practice [97]. The organization also calls for reducing administrative burdens in the Merit-Based Incentive Payment System (MIPS), urging the Centers for Medicare & Medicaid Services (CMS) to improve measure validity and fairness for small and independent practices [98].
Health Equity and Access to Care
ACP is a leading advocate for health equity, addressing systemic disparities through comprehensive policy frameworks and targeted initiatives. Its 2021 policy paper, A Comprehensive Policy Framework to Understand and Address Disparities and Discrimination in Health and Health Care, identifies racism, social determinants of health (SDOH), and structural inequities as root causes of poor outcomes in marginalized communities [32]. The framework calls for cross-sectoral reforms in education, housing, and criminal justice to advance health equity.
ACP has issued position papers on the health needs of unhoused populations, rural communities, and immigrants, recommending expanded access to housing, integrated care models, and increased federal funding for safety-net programs [34]. It advocates for policies that protect the Affordable Care Act (ACA), expand Medicaid, and preserve telehealth flexibilities to ensure continuity of care for vulnerable patients [101].
To address inequities in payment systems, ACP has called for a comprehensive overhaul of risk adjustment methodologies to account for patients’ socioeconomic circumstances. It argues that current models penalize clinicians caring for disadvantaged populations and recommends modernizing risk adjustment to promote fair reimbursement and reduce administrative complexity [102].
Reducing Administrative Burden and Supporting Physician Well-Being
Recognizing that excessive administrative tasks contribute to physician burnout, ACP launched the “Patients Before Paperwork” campaign to reduce regulatory burdens and restore clinical autonomy [42]. The initiative has led to tangible outcomes, including advocacy for the CMS Interoperability and Prior Authorization final rule, which mandates decisions within 72 hours for urgent Medicare Advantage requests [104].
ACP opposes scope-of-practice expansions that could compromise patient safety or fragment care, advocating instead for team-based models where physicians lead complex care coordination [105]. It supports workforce sustainability through loan repayment programs, improved training pathways, and policies that protect the integrity of physician-led care.
Global Health Policy and International Collaboration
ACP extends its advocacy influence internationally through engagement with global health institutions and support for multilateral cooperation. While not a direct partner in joint programs, ACP aligns with the World Health Organization (WHO) on critical public health issues. In 2021, it endorsed WHO’s call to delay additional mRNA COVID-19 vaccine doses in high-income countries to ensure equitable global distribution [106]. In 2024, ACP joined the American Academy of Pediatrics (AAP), American Academy of Family Physicians (AAFP), and American Medical Association (AMA) in opposing U.S. withdrawal from the WHO, emphasizing its role in pandemic preparedness and global disease surveillance [107].
Through its Global Engagement Committee and international chapters in over 172 countries, ACP promotes the adoption of evidence-based guidelines and supports physician leadership in low- and middle-income settings [51]. Its clinical guidelines, published in Annals of Internal Medicine, are widely used internationally and inform policy discussions on chronic disease management and health system quality.
Balancing Ethics, Advocacy, and Public Health
ACP navigates complex intersections between medical ethics, physician advocacy, and public health through a principled framework grounded in the ACP Ethics Manual, Seventh Edition [109]. It upholds core values of beneficence, autonomy, and justice, ensuring that policy positions prioritize patient welfare while supporting professional integrity. For example, ACP opposes physician-assisted suicide, advocating instead for improved access to palliative and end-of-life care [110].
The organization also addresses emerging ethical challenges, such as the use of artificial intelligence (AI) in healthcare, emphasizing transparency, equity, and clinician oversight [111]. It opposes legislation like the Healthy Technology Act of 2025 that could undermine clinical judgment, advocating for technologies that enhance rather than replace physician decision-making [112].
By integrating ethical principles into its advocacy, ACP ensures that reforms in payment, access, and practice sustainability align with the highest standards of professionalism and patient-centered care, reinforcing its role as a trusted leader in shaping the future of internal medicine and health policy.
Organizational Structure and Governance
The organizational structure and governance of the American College of Physicians (ACP) are designed to ensure strategic leadership, member representation, and effective implementation of its mission to advance the practice of internal medicine. The ACP operates through a tiered governance model that includes national leadership bodies, regional representation, and specialized committees, enabling it to respond to the evolving needs of its diverse membership and the broader healthcare environment.
Board of Regents and Board of Governors
At the apex of the ACP’s governance is the Board of Regents, which serves as the primary policy-making body responsible for setting the organization’s strategic direction, overseeing financial stewardship, and managing national initiatives [113]. Composed of elected physician leaders, the Board of Regents exercises authority over the ACP’s operations and ensures alignment with its core values of excellence, professionalism, and evidence-based practice.
Complementing the Board of Regents is the Board of Governors, a national body that represents ACP’s chapters and members at the grassroots level [114]. The Board of Governors advises the Board of Regents on issues affecting local practices, facilitates the dissemination of national programs, and plays a key role in shaping policy recommendations. This dual-board structure fosters a balance between centralized strategic oversight and decentralized member engagement, ensuring that the voices of practicing internists from diverse geographic and practice settings are integrated into decision-making processes.
Leadership roles within these bodies are documented historically, with verified records of past chairs and members dating back to the 1920s, reflecting the ACP’s long-standing commitment to transparent and accountable governance [115].
Committees, Councils, and Policy Development
The ACP’s governance framework includes numerous standing committees and councils that focus on specific domains such as clinical guidelines, ethics, health equity, and global engagement. These bodies are composed of volunteer physician members with expertise in their respective areas and are instrumental in developing policy positions, educational content, and advocacy strategies.
One of the most influential is the Clinical Guidelines Committee (CGC), which oversees the development of evidence-based clinical practice guidelines using the GRADE methodology [27]. The CGC conducts systematic reviews of scientific literature, manages conflicts of interest, and incorporates patient values and cost considerations to produce trustworthy recommendations published in Annals of Internal Medicine.
Other key governance entities include:
- The Global Engagement Committee, which guides the ACP’s international strategy and supports over 23,500 international members across 172 countries [117].
- The Health Equity Committee, which addresses disparities in healthcare access and outcomes, particularly among racial, ethnic, and socioeconomically disadvantaged populations [118].
- The Disclosure and Conflicts of Interest (DOI-COI) Review and Management Panel, which ensures the integrity of policy and guideline development by evaluating financial and intellectual disclosures from contributors [58].
These committees operate under a formal public policy development process that incorporates member input, peer review, and board approval, ensuring that ACP’s positions are evidence-based, ethically sound, and representative of the internal medicine community [120].
Structural Milestones and Organizational Evolution
A pivotal moment in the ACP’s governance evolution was its 1998 merger with the American Society of Internal Medicine (ASIM), which unified two major voices in internal medicine under a single organizational structure [21]. This merger combined ASIM’s strong advocacy and socioeconomic focus with the ACP’s emphasis on clinical excellence and education, creating a more cohesive and influential national organization [122]. The integration strengthened the ACP’s ability to advocate for physician reimbursement, practice sustainability, and patient access to care.
Since then, the ACP has continued to refine its governance to enhance responsiveness and inclusivity. The expansion of chapter-based representation through the Board of Governors has empowered regional leaders to implement national initiatives locally, while the creation of specialized committees has allowed for deeper engagement with emerging issues such as artificial intelligence in healthcare, telehealth, and the social determinants of health.
The ACP’s governance model reflects its identity as a professional college rather than a trade association, emphasizing education, ethics, and clinical excellence over political lobbying. This structure enables the organization to maintain credibility in guideline development, advocate effectively for policy reform, and support the professional development of internists across the career spectrum—from medical students and residents to seasoned practitioners and academic leaders.
International Engagement and Global Health
The American College of Physicians (ACP) maintains a robust international presence, actively engaging with internal medicine professionals across the globe to promote high standards of clinical care, medical education, and health equity. With over 23,500 international members in 172 countries as of 2026, the ACP fosters a global community through dedicated chapters, collaborative initiatives, and policy advocacy that aligns with international health priorities [51]. This global outreach is structured to support physicians, residents, and medical students practicing outside the United States and Canada, ensuring they have access to the same high-quality resources and professional development opportunities as their U.S.-based counterparts.
International Membership and Chapter Development
The ACP offers tailored membership categories for international physicians, trainees, and non-physician affiliates, enabling broad participation in its global network. International members gain full access to the ACP’s clinical resources, including evidence-based , continuing medical education (CME), and the flagship journal [52]. The organization has established active international chapters in countries such as India, Canada, Japan, Saudi Arabia, Brazil, and several nations across Latin America and the Caribbean. These chapters serve as regional hubs for professional development, leadership training, and educational programming adapted to local healthcare contexts [51].
The growth of these chapters reflects the ACP’s commitment to decentralizing knowledge exchange and empowering local leadership within the global internal medicine community. By supporting chapter-led initiatives, the ACP enhances the relevance of its programs and ensures that international voices are integrated into its policy and educational frameworks.
Global Engagement Committee and Strategic Initiatives
Guiding the ACP’s international strategy is the , which reports to the Board of Regents and comprises international chapter governors and at-large members. This committee identifies the unique needs of the global internal medicine workforce and recommends initiatives to expand outreach, improve resource accessibility, and strengthen cross-border collaboration [117]. One such initiative is the ACP Global Ambassadors Program, which deploys experienced internists to international conferences and meetings to facilitate mentorship, knowledge transfer, and partnership building [127].
To maintain consistent communication with its international membership, the ACP publishes the ACP Global Newsletter, which highlights regional activities, policy updates, and best practices in internal medicine from around the world [128]. These efforts are further supported by the organization’s 2024–2025 Impact Report, which underscores its ongoing commitment to strengthening global partnerships and enhancing support for physicians in diverse healthcare systems [129].
Collaboration with the World Health Organization and Global Health Advocacy
While the ACP does not have formal joint programs with the (WHO), it actively aligns its policy positions with WHO’s global health objectives and has publicly endorsed key WHO initiatives. In 2021, the ACP supported the WHO’s call to delay additional doses of mRNA for non-immunocompromised individuals in high-income countries to promote more equitable global vaccine distribution, demonstrating its commitment to health equity on a global scale [106].
In 2024, the ACP joined the (AAP), the (AAFP), and the (AMA) in issuing a joint statement opposing the U.S. withdrawal from the WHO. The statement emphasized the critical role of the WHO in global disease surveillance, pandemic preparedness, and health system strengthening, reinforcing the ACP’s institutional support for multilateral global health governance [107].
Influence Through Guidelines and Global Health Equity
The ACP exerts significant influence on international clinical practice through its development of evidence-based , which are widely cited and utilized by healthcare providers and policymakers worldwide. The ACP’s Clinical Guidelines Committee employs the GRADE framework to ensure methodological rigor and transparency, making its recommendations globally applicable and trustworthy [27]. As a member of the (G-I-N), the ACP has contributed to establishing global standards for managing conflicts of interest in guideline development, further enhancing the credibility and reach of its publications [133].
The ACP also advocates for global health equity by addressing social determinants of health (SDOH), climate change, and workforce disparities. Through its participation in the , the ACP aligns with WHO’s recognition of climate change as a critical public health threat, advocating for policies that mitigate environmental risks to population health [134]. Its 2026 advocacy priorities emphasize strengthening the internal medicine workforce, improving access to care, and advancing health equity—goals that resonate with the WHO’s Universal Health Coverage (UHC) agenda and the United Nations Sustainable Development Goals (SDGs) [135].
In summary, the ACP advances global health by integrating international perspectives into its governance, disseminating authoritative clinical knowledge, and advocating for equitable health systems. Through its chapters, global programs, and alignment with international bodies like the WHO, the ACP continues to shape the practice of internal medicine on a worldwide scale.
Ethics and Professional Standards
The American College of Physicians (ACP) plays a central role in defining and advancing ethical standards and professional conduct in internal medicine. Through authoritative policy statements, comprehensive ethical guidance, and leadership in medical professionalism, the ACP provides a framework that supports physicians in navigating complex clinical, social, and systemic challenges while upholding the highest standards of integrity and patient-centered care.
Foundational Ethical Frameworks and Guidelines
At the core of the ACP’s ethical leadership is the ACP Ethics Manual, Seventh Edition, published in 2024, which serves as a comprehensive resource on medical ethics in internal medicine [30]. This manual articulates key principles such as beneficence, non-maleficence, patient autonomy, and justice, emphasizing the dual responsibility of physicians to individual patients and to society. These principles guide decision-making in clinical practice and inform the ACP’s positions on emerging ethical issues.
The ACP also co-authored the landmark Physician Charter on Professionalism in 2002, developed in collaboration with the American Board of Internal Medicine (ABIM) and the European Federation of Internal Medicine. This charter established three fundamental commitments: the primacy of patient welfare, respect for patient autonomy, and the pursuit of social justice. It has since been adopted by medical organizations worldwide and remains a cornerstone of modern medical professionalism [29].
Position Statements on Contemporary Ethical Issues
The ACP regularly issues evidence-based position papers addressing pressing ethical dilemmas in medicine. For example, the organization opposes physician-assisted suicide, advocating instead for expanded access to high-quality palliative care and end-of-life services to ensure patients receive compassionate, dignified care [110].
In response to the rapid integration of technology into healthcare, the ACP has addressed the ethical implications of artificial intelligence in healthcare, emphasizing transparency, equity, and the preservation of clinical judgment. It cautions against AI systems that could undermine physician autonomy or exacerbate health disparities, advocating for patient-centered design and oversight [111].
The ACP also provides ethical guidance on the use of genetic testing, ensuring that advances in genomics are applied responsibly, with attention to privacy, informed consent, and the potential for discrimination. These efforts reflect the organization’s commitment to aligning innovation with ethical integrity.
Ethical Advocacy in Health Equity and Social Justice
The ACP integrates ethical principles into its advocacy for health equity and social justice. It recognizes that systemic inequities—rooted in racism, socioeconomic disadvantage, and structural discrimination—are not merely social issues but ethical imperatives in medicine. The 2021 policy paper “A Comprehensive Policy Framework to Understand and Address Disparities and Discrimination in Health and Health Care” calls for cross-sectoral reforms to address the social determinants of health, including housing, education, and criminal justice, as essential components of ethical medical practice [32].
The ACP also advocates for equitable physician compensation, calling for the elimination of disparities based on gender, race, and other personal characteristics. It frames this not only as an economic issue but as a matter of professional ethics and justice within the medical workforce [141].
Conflict of Interest and Guideline Integrity
To maintain the credibility of its clinical and policy recommendations, the ACP enforces rigorous conflict of interest (COI) management protocols. All members of the Clinical Guidelines Committee and other policy development bodies must disclose financial and intellectual interests from the past three years. A dedicated Disclosure and Conflicts of Interest (DOI-COI) Review and Management Panel evaluates these disclosures and recuses individuals with high-level conflicts from authorship and voting [58][59].
This structured approach ensures that the ACP’s guidelines and policy statements are developed transparently and free from undue influence, reinforcing trust in its ethical leadership.
Balancing Physician Advocacy and Patient Welfare
The ACP navigates the ethical tension between advocating for physicians and safeguarding patient interests by grounding its positions in shared values of professionalism and equity. For instance, while advocating for reduced administrative burdens through initiatives like “Patients Before Paperwork,” the ACP emphasizes that such reforms must enhance—not compromise—patient care [42].
Similarly, in its engagement with the Centers for Medicare & Medicaid Services (CMS) and Congress, the ACP supports payment models that align physician incentives with patient outcomes and equity, ensuring that financial sustainability does not come at the expense of ethical practice [35].
Conclusion
Through its comprehensive ethical frameworks, proactive policy development, and unwavering commitment to justice and professionalism, the ACP establishes itself as a moral compass in internal medicine. By addressing both individual clinical dilemmas and systemic inequities, the organization ensures that ethical standards evolve alongside medical practice, guiding physicians to uphold the highest ideals of the profession in an increasingly complex healthcare landscape.