Return to Inova.org    Request an appointment online Mark R McMahon , MD  Specialty Orthopaedic Surgery    Contact Information Practice  Commonwealth Orthopaedics & Rehabilitation PC Practice Type  Group Address  Fairfax Office 3620 Joseph Siewick Dr 100 Fairfax, VA 22033 Phone  (703) 810-5223 Fax  (703) 810-5403 Website  http://www.c-o-r.com/    Hospital Affiliation Inova Fair Oaks Hospital    Medical Education & Training Medical Education     Oregon Health Sciences University 1981 Residency     Oregon Health Sciences Univ. 1984 Fellowship     Rancho Los Amigos Medical Center (Downey,CA) Research 1984-1985 Certification     Orthopaedic Surgery 1992    Other Office Locations Burke Office 5201a Lyngate Ct Burke, VA 22015 Herndon Office 13350 Franklin Farm Rd 220 Herndon, VA 20171      Copyright © 2009 Inova Health System