Dr. David J. Mayman is the Chief of Surgical Arthritis Service and Clinical Co-Director of Computer Assisted Surgery (CAS) Center of Hospital for Special Surgery. He is a Professor of Clinical Orthopedic Surgery at Weill Cornell Medical College. Dr. David Mayman is one of a handful of national experts in computer navigation in hip and knee replacement surgery. He performs over 700 computer-navigated joint replacement surgeries a year.