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About ACP

We are a diverse, global community of internal medicine specialists and subspecialists united by a commitment to excellence.

About ACP

Who We Are

ACP is the largest medical specialty organization in the United States with members in more than 168 countries worldwide. Our 161,000 members include internal medicine physicians, related subspecialists, and medical students.

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About Internal Medicine

Internal medicine physicians are specialists who apply scientific knowledge and clinical expertise to the diagnosis, treatment, and compassionate care of adults across the spectrum from health to complex illness.

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Chapters & Regions View a complete list

United States Chapters & Regions

All Chapters

The 鶹ֱapp acts locally through its chapters and regions. To learn more about chapter services, structure and operations, see our FAQ about chapters.

Armed Forces Chapters

The 鶹ֱapp acts locally through its chapters and regions. To learn more, see our FAQ about chapters.

Global Chapters

All Global Chapters

The 鶹ֱapp acts locally through its chapters and regions. To learn more about chapter services, structure and operations, see our FAQ about chapters.


ACP Global Engagement

ACP aims to connect, support, and inspire internists worldwide by meeting their unique needs through educational engagements, and rich and mutually beneficial collaborations with other organizations across the globe on a variety of programs.


ACP Leadership

ACP is governed by an elected Board of Regents, which manages business and policy issues. The Board is advised by a network of ACP committees and by the ACP Board of Governors.

Awards and Masterships

ACP recognizes excellence and distinguished contributions to internal medicine. The College offers 23 national awards and a number of Masterships each year.


A set of resources for members interested in exploring how ACP is committed to supporting efforts that improve the practice of internal medicine.

Contact Us

Let us answer your questions. Contact our helpful Member and Product Support team today.