| G51 | Facial nerve disorders | NON-BILLABLE CODE |
| G51.0 | Bell's palsy | BILLABLE CODE |
| G51.1 | Geniculate ganglionitis | BILLABLE CODE |
| G51.2 | Melkersson's syndrome | BILLABLE CODE |
| G51.3 | Clonic hemifacial spasm | NON-BILLABLE CODE |
| G51.31 | Clonic hemifacial spasm, right | BILLABLE CODE |
| G51.32 | Clonic hemifacial spasm, left | BILLABLE CODE |
| G51.33 | Clonic hemifacial spasm, bilateral | BILLABLE CODE |
| G51.39 | Clonic hemifacial spasm, unspecified | BILLABLE CODE |
| G51.8 | Other disorders of facial nerve | BILLABLE CODE |
| G51.9 | Disorder of facial nerve, unspecified | BILLABLE CODE |
