Dr. Levy is an excellent pediatric GI doctor specializing in gastroesophageal reflux disease (GERD), colitis, Celiac Disease and Crohn's. For a short time he was at NY Hospital-Cornell but now he is back uptown at Columbia Presbyterian where he also teaches. Knowledgeable, very experienced. Very understanding, listens to parent's concerns, gives you and your child lots of attention and care. Highly recommended.