G51Header code — not billable
Facial nerve disorders
- Chapter
- 6. Diseases of the nervous system
- Category
- G51
- Effective date
- October 1, 2026
Related codes in category G51
G51.0Bell's palsyYesG51.1Geniculate ganglionitisYesG51.2Melkersson's syndromeYesG51.3Clonic hemifacial spasmG51.31Clonic hemifacial spasm, rightYesG51.32Clonic hemifacial spasm, leftYesG51.33Clonic hemifacial spasm, bilateralYesG51.39Clonic hemifacial spasm, unspecifiedYesG51.4Facial myokymiaYesG51.8Other disorders of facial nerveYesG51.9Disorder of facial nerve, unspecifiedYes
Frequently asked questions
What is ICD-10 code G51?
G51 is an ICD-10-CM diagnosis code for Facial nerve disorders.
Is G51 a billable code?
No. G51 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is G51 in?
G51 falls under Chapter 6: Diseases of the nervous system.
When did G51 become effective?
G51 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to G51?
G51 belongs to category G51, which includes 11 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.