ICD-10-CM · FY 2026 APRIL UPDATE
G51
Facial nerve disorders
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| G51.0 | Bell's palsy | Billable |
| G51.1 | Geniculate ganglionitis | Billable |
| G51.2 | Melkersson's syndrome | Billable |
| G51.3 | Clonic hemifacial spasm | Category |
| G51.31 | Clonic hemifacial spasm, right | Billable |
| G51.32 | Clonic hemifacial spasm, left | Billable |
| G51.33 | Clonic hemifacial spasm, bilateral | Billable |
| G51.39 | Clonic hemifacial spasm, unspecified | Billable |
| G51.4 | Facial myokymia | Billable |
| G51.8 | Other disorders of facial nerve | Billable |
| G51.9 | Disorder of facial nerve, unspecified | Billable |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
Open official CMS files