Joseph’s Hospital and Medical Center. Dr. Shamos’ expertise includes trauma surgery and upper gastrointestinal surgery, including the stomach and esophagus, endocrine surgery, and robotic surgery. He is a member of the American College of Surgeons, Phoenix Surgical Society and the Arizona Chapter of the American Medical Association. Dr. Shamos received his medical degree from the University of Witwaterswand in South Africa. He completed a residency in surgery from Johannesburg General Hospital and an additional residency in surgery from the University of Rochester.