Mathias A Masem MD

Mathias A. Masem, MD, is an orthopaedic surgeon specializing in hand surgery and upper-extremity orthopaedic care, including elbow conditions and peripheral nerve disorders. With more than 20 years of experience performing surgery of the hand and upper extremities, he treats a wide range of problems affecting function, comfort, and performance for patients with traumatic injuries, overuse conditions, and complex reconstructive needs. Dr. Masem earned his medical degree at the University of Minnesota. He completed internship training in general surgery at UCSF Benioff Children’s Hospital Oakland and continued postgraduate training at UCSF, including general surgery training and an orthopaedic surgery residency. He pursued advanced subspecialty education with hand surgery fellowship training in Oakland and additional clinical and research fellowship training in hand and upper-extremity surgery and microsurgery at Massachusetts General Hospital and Harvard Medical School. He also spent two years in Switzerland as an orthopaedic research physician at the University of Bern and the Laboratory for Experimental Surgery. Board certified in orthopaedic surgery and surgery of the hand, Dr. Masem serves as Chief of Hand Surgery at Alta Bates Summit Medical Center. He is an Assistant Clinical Professor in the UCSF Department of Orthopaedic Surgery, contributes to fellowship training, and has authored publications and delivered lectures in upper-extremity surgery. He also consults on hand and upper-extremity injuries for University of California, Berkeley athletic teams.