| G71 | Primary disorders of muscles | NON-BILLABLE CODE |
| G71.0 | Muscular dystrophy | NON-BILLABLE CODE |
| G71.00 | Muscular dystrophy, unspecified | BILLABLE CODE |
| G71.01 | Duchenne or Becker muscular dystrophy | BILLABLE CODE |
| G71.02 | Facioscapulohumeral muscular dystrophy | BILLABLE CODE |
| G71.09 | Other specified muscular dystrophies | BILLABLE CODE |
| G71.1 | Myotonic disorders | NON-BILLABLE CODE |
| G71.11 | Myotonic muscular dystrophy | BILLABLE CODE |
| G71.12 | Myotonia congenita | BILLABLE CODE |
| G71.13 | Myotonic chondrodystrophy | BILLABLE CODE |
| G71.14 | Drug induced myotonia | BILLABLE CODE |
| G71.19 | Other specified myotonic disorders | BILLABLE CODE |
| G71.2 | Congenital myopathies | NON-BILLABLE CODE |
| G71.20 | Congenital myopathy, unspecified | BILLABLE CODE |
| G71.21 | Nemaline myopathy | BILLABLE CODE |
| G71.22 | Centronuclear myopathy | NON-BILLABLE CODE |
| G71.220 | X-linked myotubular myopathy | BILLABLE CODE |
| G71.228 | Other centronuclear myopathy | BILLABLE CODE |
| G71.29 | Other congenital myopathy | BILLABLE CODE |
| G71.3 | Mitochondrial myopathy, not elsewhere classified | BILLABLE CODE |
| G71.9 | Primary disorder of muscle, unspecified | BILLABLE CODE |
