Dr. Mary S. Cheung is a gastroenterologist in New Hyde Park, New York and is affiliated with multiple hospitals in the area, including Long Island Jewish Medical Center at Northwell Health and Huntington Hospital at Northwell Health. She received her medical degree from State University of New York Downstate Medical Center College of Medicine and has been in practice between 11-20 years. Dr. Mary S. Cheung has expertise in treating colonoscopy, upper gi endoscopy, gastroenteritis, among other conditions - see all areas of expertise. Dr. Mary S. Cheung accepts Medicare, Aetna, Humana, Cigna, Blue Cross, United Healthcare - see other insurance plans accepted. Dr. Mary S. Cheung is highly recommended by patients.