Dr. John Sheehan is a native of Rapid City, South Dakota. He graduated from the University of South Dakota School of Medicine, Vermillion, in 1978, and completed his internship and residency in internal medicine at Tulane Affiliated Hospitals, New Orleans, LA. Dr. Sheehan is board certified in his specialty by the American Board of Internal Medicine. He is also a member of the American Medical Association, the American College of Physicians, and the New Orleans Academy of Internal Medicine.
Internal medicine deals with the prevention, diagnosis, and treatment of adult diseases. An internist cares for hospitalized and ambulatory patients and may play a major role in teaching or research. They are especially skilled in the management of patients who have undifferentiated or multi-system disease processes.