He has a special interest in laparoscopic colon surgery, mastectomy (breast removal surgery), and laser surgery. He is affiliated with St. Anthony's Hospital, Northside Hospital, and St. Petersburg General Hospital. Before performing his residency at Cleveland Clinic, Dr. Dematteis attended Georgetown University School of Medicine. TRICARE, United Healthcare HSA, and United Healthcare HMO are among the insurance carriers that Dr. Dematteis accepts.