2026 ICD-10-CM Diagnosis Code G50.8Other disorders of trigeminal nerve

ICD-10-CM Codes›G00–G99›G50-G59›G50

ICD-10-CM G50.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G50.8 is a billable ICD-10-CM diagnosis code for other disorders of trigeminal nerve. 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
G50.8
Billable Status
Yes — Valid for Submission
Code Describes
Other disorders of trigeminal nerve
Short Description
Other disorders of trigeminal nerve
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 CodeG50.8Other disorders of trigeminal nerve

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Auriculotemporal syndrome
  • Congenital trigeminal anesthesia
  • Fifth cranial nerve finding
  • Gustatory hyperhidrosis
  • Gustatory sweating
  • Hypertrophic interstitial neuropathy
  • Hypertrophic interstitial neuropathy of trigeminal nerve
  • Left Freys trigeminal nerve syndrome
  • Lesion of trigeminal ganglion
  • Mandibular nerve disorder
  • Mandibular neuropraxia
  • Numb chin syndrome
  • Paratrigeminal syndrome
  • Right Freys trigeminal nerve syndrome
  • Trigeminal nerve compression
  • Trigeminal nerve inflammation
  • Trigeminal nerve motor disorder
  • Trigeminal nerve palsy
  • Trigeminal nerve sensory disorder
  • Type I paratrigeminal syndrome
  • Type II paratrigeminal syndrome

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.

    • Atrophy, atrophic(of)
      • nerve
        • cranial
          • fifth (trigeminal)
    • Atrophy, atrophic(of)
      • nerve
        • trigeminal
    • Auriculotemporal syndrome
    • Compression
      • cranial nerve
        • fifth
    • Disorder(of)
      • nerve
        • auriculotemporal
    • Disorder(of)
      • nerve
        • trigeminal
          • specified NEC
    • Frey's syndrome
      • auriculotemporal
    • Lesion(s) (nontraumatic)
      • gasserian ganglion
    • Neuropathy, neuropathic
      • trigeminal sensory
    • Syndrome
      • auriculotemporal
    • Syndrome
      • Frey's
        • auriculotemporal
    • Syndrome
      • gustatory sweating

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

Patient EducationClinical

Peripheral Nerve Disorders

Nerves are like wires that carry messages back and forth between your brain and your body. Your peripheral nerves branch off from your brain and spinal cord and connect to all parts of your body, including your muscles and organs.

The full article covers:

  • What are peripheral nerves?
  • What are peripheral nerve disorders?
  • What causes peripheral nerve disorders?
  • What are the symptoms of peripheral nerve disorders?
  • How are peripheral nerve disorders diagnosed?
  • What are the treatments for peripheral nerve disorders?
  • Can peripheral nerve disorders be prevented?

Read the full article at MedlinePlus

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

Convert G50.8 to ICD-9-CMHistory

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

ICD-9-CM
350.8 Trigeminal nerve dis NEC
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 G50.8Overview

Is G50.8 (Disorders of trigeminal nerve) a billable code?

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

What is the ICD-9 equivalent of G50.8?

Under the General Equivalence Mappings, other disorders of trigeminal nerve converts to ICD-9-CM 350.8 (trigeminal nerve dis NEC). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.