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ICD10BillableValid for clinical use

ICD-10 Code G51.39: Clonic hemifacial spasm, unspecified

G51.39 is a billable ICD-10 diagnosis code used to classify Clonic hemifacial spasm, unspecified in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. 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 clonic hemifacial spasm, unspecified in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

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.

Code hierarchy

chapter
6Diseases of the nervous system (G00-G99)
block
G50-G59Nerve, nerve root and plexus disorders
category
G51Facial nerve disorders
category
G51.3Clonic hemifacial spasm
currentG51.3

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

NeurologistGeneral Physician

Coverage-related procedures and services

CPT 61800high
APPLICATION OF STEREOTACTIC HEADFRAME FOR STEREOTACTIC RADIOSURGERY (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 70460high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITH CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 70450high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITHOUT CONTRAST MATERIAL
Source: CMS coverage guidance
CPT 70470high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITHOUT CONTRAST MATERIAL, FOLLOWED BY CONTRAST MATERIAL(S) AND FURTHER SECTIONS
Source: CMS coverage guidance
HCPCS G0339high
IMAGE-GUIDED ROBOTIC LINEAR ACCELERATOR-BASED STEREOTACTIC RADIOSURGERY, COMPLETE COURSE OF THERAPY IN ONE SESSION OR FIRST SESSION OF FRACTIONATED TREATMENT
Source: CMS coverage guidance
HCPCS G0340high
IMAGE-GUIDED ROBOTIC LINEAR ACCELERATOR-BASED STEREOTACTIC RADIOSURGERY, DELIVERY INCLUDING COLLIMATOR CHANGES AND CUSTOM PLUGGING, FRACTIONATED TREATMENT, ALL LESIONS, PER SESSION, SECOND THROUGH FIFTH SESSIONS, MAXIMUM FIVE SESSIONS PER COURSE OF TREATMENT
Source: CMS coverage guidance

Coding guidelines

Common synonyms

Clonic hemifacial spasm, unspecifiedClonic hemifacial spasm

Frequently asked questions

Code details

CodeG51.39
SystemICD10
Display nameClonic hemifacial spasm, unspecified
ChapterDiseases of the nervous system (G00-G99)
BlockNerve, nerve root and plexus disorders

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

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.