ACP is a national organization of internists who apply scientific knowledge and clinical expertise to the diagnosis,treatment, and compassionate care of adults. The American College of Physicians (ACP) is a national organization of internists — physician specialists who apply scientific knowledge and clinical expertise to the diagnosis, treatment, and compassionate care of adults across the spectr
um from health to complex illness. Its membership of 141,000 includes internists, internal medicine subspecialists, and medical students, residents, and fellows. The Missouri Chapter of the ACP has more than 2,400 physician and student members.