Gibson, Mark D. Return to Directory Provider Name: Gibson, Mark D. Primary Specialty: Orthopedic Surgery Group: AMS – Orthopedic, Elmira County: Chemung Street: Horseheads Medical Office Bldg. City: Horseheads State: NY Zip: 14845 Phone: (607) 795-1666 Fax: (607) 796-0839 Gender: Male Medical School: University Iowa College of Medicine Degree Date: 1976