Jonathan Leighton, M.D., elected president, American College of Gastroenterology

Jonathan Leighton, M.D. (GI ’94), Division of Gastroenterology and Hepatology at Mayo Clinic in Arizona, is the 2023–2024 president of the American College of Gastroenterology, a medical organization representing more than 19,000 clinical gastroenterologists and other specialists in digestive diseases. Dr. Leighton is a fellow of the ACG and was elected to its board of trustees in 2013.
Dr. Leighton has held Mayo Clinic leadership positions including chair of the Division of Gastroenterology and Hepatology at Mayo Clinic in Arizona, director of the Inflammatory Bowel Disease Clinic, chair of the Outpatient Practice Subcommittee, vice chair of the Department of Medicine and a member of the Mayo Clinic in Arizona Executive Operations Team. Dr. Leighton is a professor of medicine in the Mayo Clinic College of Medicine and Science.
Dr. Leighton’s clinical interests include inflammatory bowel disease, colorectal neoplasia and diseases of the small bowel. His research includes new devices for imaging the small bowel — including capsule endoscopy and balloon enteroscopy — and new technologies for detecting colon polyps and colon cancer. Dr. Leighton’s other research interests include new therapies for inflammatory bowel disease and biomarker discovery for ulcerative colitis and Crohn’s disease.