Robert G. Marx, MD

Dr. Widmann is Professor of Orthopedic Surgery and has served as Chief of the Pediatric Orthopedic Surgery Service at HSS since 2004. Dr. Widmann specializes in the surgical and nonsurgical treatment of pediatric spinal deformity and pediatric limb deformity. Dr. Widmann is an expert pediatric spinal deformity surgeon and pediatric limb deformity surgeon with established clinical and research expertise, and has published over 50 peer-reviewed articles and multiple book chapters. Dr. Widmann is focused on providing state-of-the-art surgical and nonsurgical management for pediatric patients with complex deformities.

Dr. MacGillivray is an Associate Attending Orthopedic Surgeon at Hospital for Special Surgery and NewYork-Presbyterian Hospital. He currently serves as Team Physician to the US Ski Team. He has also served as an Orthopedic Consultant for the New York Giants, the National Hockey League Players' Association team physician for St. John's University, the New York Saints Professional La Crosse Team and the US Snow Boarding Team. He is also a member of the Board of Directors at the Carlos Otis Clinic, Stratton Mountain in Vermont.

Dr. Demetracopoulos is an orthopedic surgeon at Hospital for Special Surgery specializing in foot and ankle surgery.