Dr. Steven Gruenstein is an oncologist 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 Genoa Faculty of Medicine and has been in practice for more than 20 years. Dr. Steven Gruenstein has expertise in treating lung cancer, lymphoma, prostate cancer, among other conditions - see all areas of expertise. Dr. Steven Gruenstein accepts Medicare, Aetna, Cigna, Blue Cross - see other insurance plans accepted. Dr. Steven Gruenstein is highly recommended by patients.