Dr. Robert Leventhal is a gastroenterologist in Waterbury, Connecticut and is affiliated with multiple hospitals in the area, including St. Mary’s Hospital and Waterbury Hospital. He received his medical degree from St. George’s University School of Medicine and has been in practice for more than 20 years. Dr. Leventhal accepts several types of health insurance, listed below. He is one of 11 doctors at St. Mary’s Hospital and one of 12 at Waterbury Hospital who specialize in Gastroenterology.