Private company
Logo: acponline.org3
American medical-specialty organization
The American College of Physicians (ACP) is a Philadelphia-based national organization of internal medicine physicians, who specialize in the diagnosis, treatment, and care of adults. With 162,000 members, ACP is the largest medical-specialty organization and second-largest physician group in the United States. The ACP is one of two professional organizations representing internal medicine physicians in the United States, and the other organization is the American College of Osteopathic Internists.2 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
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The American College of Physicians (ACP) is a Philadelphia-based national organization of internal medicine physicians, who specialize in the diagnosis, treatment, and care of adults. With 162,000 members, ACP is the largest medical-specialty organization and second-largest physician group in the United States. The ACP is one of two professional organizations representing internal medicine physicians in the United States, and the other organization is the American College of Osteopathic Internists. Its flagship journal, the Annals of Internal Medicine, is among the most widely cited peer-reviewed medical journals in the world.2
ACP was founded in 1915 to promote the science and practice of medicine. In 1998, it merged with the American Society of Internal Medicine (ASIM). ASIM's focus on the economic, political, and social aspects of medical care both enlarged and complemented its mission.
Known as ACP-ASIM from 1998 to 2003, the organization re-adopted "American College of Physicians" as its corporate name from 2003 on.
From Wikipedia’s article on American College of Physicians, shared under CC BY-SA 4.0.4
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