John Nassar, MD

Dr. Seidel's areas of focus include hip, knee, shoulder and orthopedic oncology. He offers many specialized treatments including shoulder replacement and revision surgery, minimally invasive anterior hip replacement surgery, robotic knee surgery, outpatient hip and knee replacement surgery, injections such as steroid, viscosupplementation (gel) and Platelet-rich plasma (PRP), and stem cell therapy. Dr. Seidel was born and raised in Phoenix. He is very active in orthopedic research and training, having trained residents from the University of Arizona Orthopedic Residency Program and the New Mexico Mountain View Regional Medical Center Orthopedic Residency Program for more than a decade.

Frank Moussa, MD is a board-certified, fellowship-trained orthopedic surgeon. Dr. Moussa completed a Sports Medicine Fellowship at the University of Missouri-Kansas. Dr. Moussa's areas of focus include knee, shoulder, sports medicine, total joint care and fracture care. He offers many specialized treatments, including robotics, injections and arthritis stem cell treatment. He has treated a broad spectrum of patients in his more than 20 years of practice, from the weekend warrior to the professional athlete. He is proud to be starting his third decade of service to patients at HonorHealth. He has treated a broad spectrum of patients in his more than 20 years of practice, from the weekend warrior to the professional athlete. He is proud to be starting his third decade of service to patients at HonorHealth.