Dr. John C. Gruendel is a cardiologist in Carmel, New York and is affiliated with Putnam Hospital. He received his medical degree from New York Medical College and has been in practice for more than 20 years. Dr. John C. Gruendel has expertise in treating coronary artery disease, hypertension & high blood pressure, aneurysm, among other conditions - see all areas of expertise. Dr. John C. Gruendel accepts Medicare, Aetna, Humana, Cigna, Blue Cross - see other insurance plans accepted. Dr. John C. Gruendel is highly recommended by patients.