Dr. Joseph A. Nash is a gastroenterologist in New York, New York and is affiliated with multiple hospitals in the area, including Mount Sinai Morningside and Mount Sinai West Hospitals, Lenox Hill Hospital at Northwell Health and West Side GI. He received his medical degree from New York Medical College and has been in practice for more than 20 years. Dr. Joseph A. Nash has expertise in treating colonoscopy, upper gi endoscopy, gastroenteritis, among other conditions - see all areas of expertise. Dr. Joseph A. Nash accepts Medicare, Aetna, Blue Cross, United Healthcare - see other insurance plans accepted.