Dr. Mark T. Birns, MD, is a highly experienced gastroenterologist based in Rockville, Maryland, with over 49 years in the medical field. He specializes in gastroenterology and internal medicine, providing expert care for a wide array of gastrointestinal conditions, including chronic inflammatory bowel disease (IBD), colonoscopy, upper GI endoscopy, gastrointestinal bleeding, acid reflux, and peptic ulcers. Dr....