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(703) 776-3731


Our History

Radiation Oncology Associates, P.C. is a professional corporation incorporated in Virginia. It was founded in 1977 by John G. Maier, MD, PhD. Dr. Maier had a distinguished career at Walter Reed Army Hospital, where he became one of the world’s foremost experts in cancer of the testis. After retiring from the Army, he accepted a position as Chairman of the Department of Radiation Oncology at George Washington University Hospital. In 1977, he agreed to come to Fairfax Hospital as its first radiation oncologist and assemble a group of associates. He set the high standards that continue to guide the group.

Radiation Oncology Associates has grown over the years to a group of seven board certified & eligible physicians who are the exclusive providers of professional services in radiation oncology in Fairfax, Loudoun and Prince William County: