Dr. Mark H. Gardenswartz is a nephrologist in New York, New York and is affiliated with multiple hospitals in the area, including Mount Sinai Hospital and Lenox Hill Hospital at Northwell Health. He received his medical degree from University of Colorado School of Medicine and has been in practice for more than 20 years. Dr. Mark H. Gardenswartz has expertise in treating kidney disease, among other conditions - see all areas of expertise. Dr. Mark H. Gardenswartz accepts Medicare, Aetna, Cigna, Blue Cross - see other insurance plans accepted.