G51: Facial nerve disorders

Codes under G51 (Facial nerve disorders). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
G51.0	Bell's palsy	✓
G51.1	Geniculate ganglionitis	✓
G51.2	Melkersson's syndrome	✓
G51.3	Clonic hemifacial spasm	—
G51.4	Facial myokymia	✓
G51.8	Other disorders of facial nerve	✓
G51.9	Disorder of facial nerve, unspecified	✓
G51.31	Clonic hemifacial spasm, right	✓
G51.32	Clonic hemifacial spasm, left	✓
G51.33	Clonic hemifacial spasm, bilateral	✓
G51.39	Clonic hemifacial spasm, unspecified	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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