Dr. Greenwald is Board Certified in both Internal Medicine and Gastroenterology. He is Chairman of the Gastroenterology Department at Lawrence & Memorial Hospital in New London. He is also a member of the American Medical Association and the American Gastroenterology Association. Dr. Greenwald specializes in all aspects of diseases related to the liver and digestive tract, including nutrition and cancer screening. He has been awarded "top doc in Connecticut" in his specialty by his peers by Connecticut magazine for the last three years.