9021.40.00 | 00 | Orthopaedic appliances, including crutches, surgical belts and trusses; splints and other fracture appliances; artificial parts of the body; hearing aids and other appliances which are worn or carried, or implanted in the body, to compensate for a defect or disability. - Hearing aids, excluding parts and accessories | NMB | Free | CCCT, LDCT |