The American College of Osteopathic Internists (ACOI) is a medical association in the United States representing osteopathic physicians who specialize in internal medicine.[1][2] The ACOI is one of two professional organizations representing internal medicine physicians in the United States, the other organization is the American College of Physicians.[3] ACOI is accredited by the American Osteopathic Association (AOA) and the Accreditation Council for Continuing Medical Education (ACCME).[4][5]
ACOI was founded in 1923 as the American Society of Osteopathic Internists. In 1941, the organization adopted its current name, American College of Osteopathic Internists.
Membership
ACOI 2025-2026 President Damon L. Baker, DO, MACOI
Membership levels are student, resident/fellow, active, retired, emeritus, and associate. Active members are physicians (DO and MD degrees) who have completed internal medicine training and hold a valid license to practice. Associate members are physicians trained in any other specialty than internal medicine (e.g., emergency medicine, family medicine, obgyn, etc.) or healthcare professionals.[6]
The honor of fellow is bestowed upon members who exhibit dedication to the profession. The recipient receives becomes a Fellow of the American College of Osteopathic Internists, which is abbreviated FACOI.[10] Honorary versions of this award are also given. On November 14, 1979, Linus Pauling received an Honorary Fellow of the American College of Osteopathic Internists by the ACOI for delivering a presentation at the ACOI Convocation.[11]
The Gillum Society of Master Fellows was established in 1994 to honor fellows who have demonstrated outstanding past and present contributions to the College or to osteopathic internal medicine on a local, regional, or national level. The Society is named for Grover Gillum, DO, a past president of ACOI and was department chairman and residency program director at the Department of Internal Medicine at the Kansas City College of Osteopathy.[12]
Memorial awards
ACOI established memorial awards to honor the legacy of two remarkable long-time members:
The Anthony J. Malcoun Award recognizes an outstanding nephrology fellow.[13] The award is named for Anthony J. Malcoun, DO, MACOI, a past president of ACOI, who received the ACOI Internist of the Year in 2014.[14][15]
David Susser Award recognizes internal medicine residents.[16] The award is named for David Susser, DO, MACOI, a past president of ACOI, and cardiologist and former head of Internal Medicine at Botsford Hospital (Michigan).[17]
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