Get the WebMD Daily newsletter for health tips, wellness updates and more.
By clicking "Subscribe," I agree to the WebMD Terms and Conditions and Privacy Policy. I also agree to receive emails from WebMD and I understand that I may opt out of WebMD subscriptions at any time.
Dr. Oneill graduated from the University of California San Francisco School of Medicine in 1985. He works in Bethesda, MD and 3 other locations and specializes in Internal Medicine and Orthopedic Surgery. Dr. Oneill is affiliated with Medstar Union Memorial Hospital.