Dr. John L. O'Donnell is an orthopedist in Orchard Park, New York and is affiliated with Mercy Hospital-Buffalo. He received his medical degree from University of Michigan Medical School and has been in practice for more than 20 years. Dr. John L. O'Donnell has expertise in treating knee replacement, arthritis, hip replacement, among other conditions - see all areas of expertise. Dr. John L. O'Donnell accepts Aetna - see other insurance plans accepted.