Mark H. Johnston, MD, FACP, FACG, AGAF
Areas of Interest
GERD, Barrett's Esophagus, Esophageal Cancer
Internal Medicine and Gastroenterology
Board certified in Internal Medicine and Gastroenterology, Dr. Johnston is former Chief of Gastroenterology at the National Naval Medical Center and retired as a Navy Captain (0-6) in 2005. He is the author of numerous publications, and has spoken nationally and internationally in his areas of research: GERD, Barrett’s esophagus and esophageal cancer. He is internationally known for his expertise in esophageal disease and has several U.S. Patents for the treatment of Barrett’s esophagus and esophageal cancer. He has treated numerous members of Congress, the Supreme Court and White House.