G51

ICD-10Non-billable category

Facial nerve disorders

Official ICD-10-CM descriptor (FY2026)

Facial nerve disorders

G51 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Includes

disorders of 7th cranial nerve

More specific codes under G51

G51.0Bell's palsy
G51.1Geniculate ganglionitis
G51.2Melkersson's syndrome
G51.3Clonic hemifacial spasmcategory
G51.4Facial myokymia
G51.8Other disorders of facial nerve
G51.9Disorder of facial nerve, unspecified

Where this code sits

Chapter: 6. Diseases of the nervous system (G00-G99)
Block: Nerve, nerve root and plexus disorders (G50-G59)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.