Dr. Gerald V. McMahon is an internist in Syracuse, New York and is affiliated with multiple hospitals in the area, including St. Joseph's Health Hospital and Upstate University Hospital. He received his medical degree from SUNY Upstate Medical University and has been in practice for more than 20 years. Dr. Gerald V. McMahon has expertise in treating arthritis, hypertension & high blood pressure, diabetes, among other conditions - see all areas of expertise. Dr. Gerald V. McMahon accepts Medicare, Aetna, Blue Cross - see other insurance plans accepted. Dr. Gerald V. McMahon is highly recommended by patients.