Print this Page Gastroenterology Services & Programs Orbera Intra-Gastric Balloon Pediatric Gastroenterology Watch Colonoscopy Prep Video Locations & Contact Meet the Physicians Gastroenterology Imtiaz Alam, MDUMC GastroenterologyView Profile Vanessa Costilla, MDUMC GastroenterologyView Profile Kanak Das, MDUMC GastroenterologyView Profile Robert Simek, MDUMC Children’s GastroenterologyView Profile