New Search Gregory John Gagnon M.D. (240) 566-4500 Department Radiology Specialty Radiation Oncology Primary Office Address: FMH Radiation Oncology Center 1562 Opossumtown Pike Frederick, MD 21702 Phone: (240) 566-4500 Recommend this Physician Get Directions Education Medical School - University of Virginia School of Medicine Internship - University of Virginia Affiliate Hospitals Residency - Georgetown University Hospital Board Certifications American Board of Radiology