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American College of Physicians's Overview

Total employees1660
HeadquartersPhiladelphia
Founded1915

The American College of Physicians (ACP) is a national organization of internists—physicians who specialize in the diagnosis, treatment, and compassionate care of adults across the spectrum from health to complex illness. Founded in 1915, ACP is the largest medical-specialty organization and second-largest physician group in the United States. Its membership of 161,000 includes internists, internal medicine subspecialists, and medical students, residents, and fellows. ACP's mission is to promote the quality and effectiveness of health care by fostering excellence and professionalism in the practice of medicine. They are a leading publisher of medical information, including the Annals of Internal Medicine.

Where is American College of Physicians's Headquarters?

HQ Function

Serves as the primary administrative hub, overseeing membership services, educational program development, policy advocacy, and the publication of medical journals and guidelines.

Notable Features:

Located in the historic Independence Mall area, reflecting its long-standing presence and commitment to the foundations of American medicine. The building is designed to facilitate collaboration and support the organization's diverse functions.

Work Culture:

A professional, mission-driven environment focused on advancing internal medicine and supporting its members. Emphasis on collaboration, evidence-based practices, and continuous learning.

HQ Significance:

The Philadelphia headquarters is pivotal for coordinating national initiatives, developing clinical guidelines, and engaging with medical professionals across the country to improve patient care.

Values Reflected in HQ: The headquarters' location and operations reflect ACP's commitment to excellence, professionalism, medical heritage, and service to the medical community and public health.

Location:

While primarily a U.S.-based organization, ACP has a significant international membership base with members in more than 140 countries outside the U.S. and Canada. It supports internists globally through international chapters, educational resources like Annals of Internal Medicine (which has a global readership), international meetings, and by promoting high standards of medical care worldwide. ACP also offers international fellowship (FACP) and mastership (MACP) recognitions.

Street Address:

190 N Independence Mall W

City:

Philadelphia

State/Province:

PA

Country:

USA

American College of Physicians's Global Presence

Washington, D.C., USA

Address: 25 Massachusetts Ave NW, Suite 700, Washington, DC 20001

To represent the interests of internists and their patients at the federal level, influencing healthcare legislation and regulations to improve the quality and accessibility of care.

Buying Intent Signals for American College of Physicians

Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
*Example signal, not calculated in real time

Executive Team of American College of Physicians

As of April 2025, American College of Physicians' leadership includes:

Darilyn V. Moyer, MD, FACP - Executive Vice President and Chief Executive Officer
Omar T. Atiq, MD, FACP - President (2023-2024)
Isaac O. Opole, MBChB, PhD, FACP - President-elect (2023-2024)
Eileen D. Barrett, MD, MPH, SFHM, MACP - Chair, Board of Regents (2023-2024)
Ryan D. Mire, MD, FACP - Immediate Past President (2023-2024)
Philip A. Masters, MD, FACP - Vice President, Membership and Global Engagement
Shari M. Erickson, MPH - Vice President, Governmental Affairs and Medical Practice

Investors of American College of Physicians

American College of Physicians has been backed by several prominent investors over the years, including:

Not applicable (Non-profit 501(c)(3) organization funded by membership dues, publication sales, educational programs, grants, and contributions)

Executive New Hires/Exits in the Last 12 Months

Hire0
Exits0

Key leadership transitions at ACP typically involve the annual rotation of elected physician leadership roles such as President and President-elect. In April 2023, Dr. Omar T. Atiq became President, and Dr. Isaac O. Opole became President-elect. No major unexpected hires or exits for senior staff executive positions like CEO/EVP were prominently reported in the last 12 months.

Departures

Ryan D. Mire, MD, FACP, Dr. Ryan D. Mire concluded his term as President, transitioning to Immediate Past President, as per the organization's leadership cycle.

New Appointments:

Omar T. Atiq, MD, FACP, Dr. Omar T. Atiq was installed as President of ACP during the Internal Medicine Meeting 2023.
Isaac O. Opole, MBChB, PhD, FACP, Dr. Isaac O. Opole was appointed President-Elect of ACP, set to become President in 2024.

Technology (Tech Stack) used by American College of Physicians

Discover the tools American College of Physicians uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.

American College of Physicians Email Formats and Examples

The American College of Physicians primarily uses the acponline.org domain for its email communications. Common formats include the first initial followed by the last name.

[first_initial][last]@acponline.org

Format

dmoyer@acponline.org

Example

80%

Success rate

News and media

ACP NewsroomFebruary 29, 2024

American College of Physicians and Annals of Internal Medicine Call for Action on Long COVID

ACP and Annals of Internal Medicine published a new joint series of papers and an editorial calling for action to address the ongoing challenges of Long COVID, emphasizing the need for more research, clinical guidance, and support for patients....more

American Heart Association NewsNovember 9, 2023

American College of Physicians, AHA, ACC Release Clinical Guideline on Managing CV Disease in Patients With Type 2 Diabetes

The American College of Physicians, American Heart Association, and American College of Cardiology jointly released a new clinical guideline for managing cardiovascular disease in adults with type 2 diabetes, published in Annals of Internal Medicine and Circulation....more

ACP NewsroomApril 29, 2023

American College of Physicians Installs Dr. Omar Atiq as President

Dr. Omar T. Atiq, FACP, a medical oncologist from Little Rock, Arkansas, was installed as President of the American College of Physicians during Internal Medicine Meeting 2023. His term began at the conclusion of the meeting....more

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