Dr. Lebwohl is Professor of Medicine and Epidemiology at Columbia University Irving Medical Center and serves as the Associate Clinical Chief of the Division of Gastroenterology and as the Director of Clinical Research at the Celiac Disease Center at Columbia University. He is Past President of the Society for the Study of Celiac Disease, and collaborates with investigators in the United States and abroad in epidemiology, patterns of care, natural history, and therapeutics. He has co-authored more than 350 peer-reviewed publications. His research is supported by the National Institutes of Health, and past research funding includes the American Gastroenterological Association, the Celiac Disease Foundation, and the American Scandinavian Foundation. Dr. Lebwohl served on the Gastrointestinal Drugs Advisory Committee of the United States Food and Drug Administration (2017-2025), including a term as Chair. He maintains a clinical practice and is heavily involved in medical education, teaching regularly on topics including celiac disease, evidence-based medicine, clinical decision making, pseudoscience, diarrhea, the Beethoven string quartets, and colorectal cancer screening.