Physicians and surgeons diagnose illnesses and prescribe and administer treatment for people suffering from injury or disease. Physicians examine patients, obtain medical histories, and order, perform, and interpret diagnostic tests. They counsel patients on diet, hygiene, and preventive healthcare.
There are two types of physicians: M.D. (Medical Doctor) and D.O. (Doctor of Osteopathic Medicine). M.D.s also are known as allopathic physicians.