Including arm, leg, back, and neck braces; artificial eyes; artificial limbs (and their replacement parts); breast prostheses (after mastectomy); and prosthetic devices needed to replace an internal body part or function (including ostomy supplies, and parenteral and enteral nutrition therapy) when ordered by a doctor. For Medicare to cover your prosthetic or orthotic, you must go to a supplier that is enrolled in Medicare. You pay 20% of the Medicare-approved amount, and the Part B deductible applies.