CMS 855S--Medicare Enrollment Application for Durable Medical Equipment, Prosthetics, Orthotics, and Supplies (DMEPOS) Suppliers Form 855S is completed by the following types of DMEPOS suppliers: -- Ambulatory Surgical Center -- Medical Supply Company -- Pharmacy -- Department Store -- Nursing Facility (other) -- Physical Therapist -- Grocery Store -- Occupational Therapist -- Physician, including Optometrist -- Home Health Agency -- Optician -- Prosthetics Personnel -- Hospital -- Orthotics Personnel -- Prosthetic/Orthotic Personnel -- Indian Health Service -- Oxygen and/or Oxygen Related Equipment Supplier -- Rehabilitation Agency -- Intermediate Care Nursing Facility -- Pedorthic Personnel -- Skilled Nursing Facility