Dr. David P. Magier is a gastroenterologist in Lake Success, New York and is affiliated with multiple hospitals in the area, including St. Francis Hospital & Heart Center and Long Island Jewish Medical Center at Northwell Health. He received his medical degree from Icahn School of Medicine at Mount Sinai and has been in practice for more than 20 years. Dr. David P. Magier has expertise in treating upper gi endoscopy, inflammatory bowel disease (ibd), gastroenteritis, among other conditions - see all areas of expertise. Dr. David P. Magier accepts Medicare, Aetna, Humana, Cigna, Blue Cross, United Healthcare - see other insurance plans accepted.