David A. Johnson, M.D.
Biliary Tract Disease, Colon Cancer, Colonoscopy
American Board of Internal Medicine - Gastroenterology
American Board of Internal Medicine - Internal Medicine
M.D. : UVA (University of Virginia) School of Medicine - 1980
Internship: Portsmouth Naval Medical Center (June 01, 1980 - June 30, 1981)
Residency: Walter Reed National Military Medical Center (July 01, 1984 - June 30, 1986)
Fellowship: Naval Medical Center-MD (September 01, 1984 - June 30, 1986)