What Do Physicians Do? Physicians diagnose and treat diseases, illnesses, injuries, and physical and psychological problems. They examine and treat patients; obtain medical histories; and order, perform, and interpret diagnostic tests. They may also counsel patients on diet, hygiene, and preventive health care. There are two types of physicians, the Medical Doctor (MD), or allopathic physician, and the Doctor of Osteopathy (DO). Both types of physicians may use all accepted …Read More