American College of Physicians: A medical society for internal medicine. The ACP motto is "Doctors for Adults." Its mission is "to enhance the quality and effectiveness of health care by fostering excellence and professionalism in the practice of medicine." ACP members include over 100,000 physicians in general internal medicine and related subspecialties, including cardiology, gastroenterology, nephrology, endocrinology, hematology, rheumatology, neurology, pulmonary disease, oncology, infectious diseases, allergy and immunology, and geriatrics. The ACP publishes the medical journal Annals of Internal Medicine.