Dr. Gregory S. DiFelice is a fellowship-trained orthopedic surgeon specializing in sports traumatology and joint reconstruction surgery at Hospital for Special Surgery (HSS) and NewYork-Presbyterian Hospital. He also holds an appointment at Weill Cornell Medical College as an assistant professor. Regional interests include the knee, shoulder and hip. He has particular interests in ligament reconstruction of the knee with extensive experience in multi-ligament reconstructions, cartilage and meniscal repair of the knee, arthroscopic shoulder surgery including labral and rotator cuff repairs, and arthroplasty of the knee, shoulder and hip. He frequently lectures on these interests both domestically and internationally.