ICD-10-CM 2027 diagnosis code

G51Facial nerve disorders

Not billable — use a more specific code

G51 is a header code, so it can't be reported by itself. Choose one of the 7 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G51

G51 is the ICD-10-CM diagnosis code for facial nerve disorders. It belongs to block G50-G59 (nerve, nerve root and plexus disorders) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: G51.0 (palsy), G51.1 (ganglionitis), G51.2 (syndrome), G51.3 (spasm), G51.4 (myokymia), G51.8 (nerve) and G51.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under G51

Coding notes

IncludesFurther defines the content of the category

disorders of 7th cranial nerve

Notes that apply from higher levels

Instructions written at a parent level also apply to G51.

Broader instructions also apply from G50-G59 Nerve, nerve root and plexus disorders and Chapter 6: Diseases of the nervous system.

Code history

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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about G51

Is G51 billable?: No. G51 is a header code. Report one of its more specific subcodes instead.