John (Jack) L. Leahy, MD is professor of medicine and chief, of the Division of Endocrinology, Diabetes and Metabolism at the University of Vermont College of Medicine.
Dr. Leahy's current NIH research activities are focusing on the mechanism of beta-cell function. He has authored over 60 publications on various topics important to identifying causes of beta-cell dysfunction in diabetes as well as the clinical impact on patient therapy and patient outcomes. Additionally he has authored 16 book chapters and has served as editor for several medical books. He is currently the editor-in-chief for Insulin Therapy and Your Practice: Strategies for Improving Patient Outcomes and co-editor for Diabetes, Year Book of Endocrinology .

        He is a member of the American Diabetes Association, the American Association for the Advancement of Science, the American Federation of Clinical Research, the European Association for the Study of Diabetes and the Endocrine Society. Dr. Leahy as served on various committees for these professional societies. He has also served on committees for the National Institutes of Health and the Juvenile Diabetes Research Foundation. Dr. Leahy has received numerous awards for his research and teaching activities.