Alexandria 4320 Seminary Rd, Alexandria, VA 22304 Virginia Hospital Center 1701 N George Mason Dr, Arlington, VA 22205 Fairfax Hospital 3300 Gallows Rd, Falls Church, VA 22042 Medstar 110 Irving Street, NW, Washington, DC 20010  Children's National Medical Center 111 Michigan Ave NW, Washington, DC 20010  George Washington University Hospital 900 23rd St NW, Washington, DC 20037 Fort Washington Hospital 11711 Livingston Rd, Fort Washington, MD 20744 Mt Vernon 2501 Parkers Ln, Alexandria, VA 22306 HealthPlex Franconia/Springfield 6355 Walker Ln, Alexandria, VA 22310 Fort Belvoir Community Hospital 9300 DeWitt Loop, Fort Belvoir, VA 22060