What does ICD-10 code G51 mean?

ICD-10 code G51 is the standardized code used for facial nerve disorders in medical records and coding systems.

When is ICD-10 code G51 used?

Doctors, hospitals, and insurers may use ICD-10 code G51 when recording facial nerve disorders in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code G51 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code G51: Facial nerve disorders

Name: ICD-10 Code G51: Facial nerve disorders
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:07:08.439Z

G51 is an ICD-10 diagnosis entry used to group records related to Facial nerve disorders. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

When is it used?

May be used when a clinician documents facial nerve disorders in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

6Diseases of the nervous system (G00-G99)

block

G50-G59Nerve, nerve root and plexus disorders

currentG50-G59

Official coding notes

Includes

disorders of 7th cranial nerve

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

NeurologistGeneral Physician

Sibling codes

G50Disorders of trigeminal nerve G52Disorders of other cranial nerves G53Cranial nerve disorders in diseases classified elsewherebillable G54Nerve root and plexus disorders G55Nerve root and plexus compressions in diseases classified elsewherebillable G56Mononeuropathies of upper limb G57Mononeuropathies of lower limb G58Other mononeuropathies G59Mononeuropathy in diseases classified elsewherebillable

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.

Legacy codes

G51

Replacement codes

G51.0 — Bell's palsyG51.1 — Geniculate ganglionitisG51.2 — Melkersson's syndromeG51.4 — Facial myokymiaG51.8 — Other disorders of facial nerveG51.9 — Disorder of facial nerve, unspecified

Common synonyms

Facial nerve disorders

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.