2026 ICD-10-CM Diagnosis Code G50.0Trigeminal neuralgia

ICD-10-CM Codes›G00–G99›G50-G59›G50

ICD-10-CM G50.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G50.0 is a billable ICD-10-CM diagnosis code for trigeminal neuralgia. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nerve and nerve root disorders.

Code Identity

ICD-10-CM Code
G50.0
Billable Status
Yes — Valid for Submission
Code Describes
Trigeminal neuralgia
Short Description
Trigeminal neuralgia
Same as the full description in the CMS dataset.
Parent Code
G50
Disorders of trigeminal nerve

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG50-G59Nerve, nerve root and plexus disorders
CategoryG50Disorders of trigeminal nerve
This CodeG50.0Trigeminal neuralgia

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorder of left trigeminal nerve
  • Disorder of right trigeminal nerve
  • Fifth cranial nerve finding
  • Idiopathic trigeminal neuralgia
  • Idiopathic trigeminal neuropathy
  • Left trigeminal neuralgia
  • Nasociliary neuralgia
  • Right trigeminal neuralgia
  • Secondary trigeminal neuralgia
  • Trigeminal neuralgia

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Syndrome of paroxysmal facial pain
  • Tic douloureux

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Neuralgia, neuralgic(acute)
      • trigeminal
    • Spasm(s), spastic, spasticity
      • nerve, trigeminal
    • Syndrome
      • facial pain, paroxysmal
    • Syndrome
      • paroxysmal facial pain
    • Tic(disorder)
      • douloureux

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS017
Nerve and nerve root disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Trigeminal Neuralgia

    a syndrome characterized by recurrent episodes of excruciating pain lasting several seconds or longer in the sensory distribution of the trigeminal nerve. pain may be initiated by stimulation of trigger points on the face, lips, or gums or by movement of facial muscles or chewing. associated conditions include multiple sclerosis, vascular anomalies, aneurysms, and neoplasms. (adams et al., principles of neurology, 6th ed, p187)

Patient EducationClinical

Trigeminal Neuralgia

Trigeminal neuralgia (TN) is a type of chronic pain that affects your face. It causes extreme, sudden burning or shock-like pain. It usually affects one side of the face. Any vibration on your face, even from talking, can set it off. The condition may come and go, disappearing for days or even months.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert G50.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
350.1 Trigeminal neuralgia
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G50.0Overview

Is G50.0 (Disorders of trigeminal nerve) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report trigeminal neuralgia on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of G50.0?

Under the General Equivalence Mappings, trigeminal neuralgia converts to ICD-9-CM 350.1 (trigeminal neuralgia). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.