2026 ICD-10-CM Diagnosis Code G58.8Other specified mononeuropathies

ICD-10-CM Codes›G00–G99›G50-G59›G58

ICD-10-CM G58.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G58.8 is a billable ICD-10-CM diagnosis code for other specified mononeuropathies. 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
G58.8
Billable Status
Yes — Valid for Submission
Code Describes
Other specified mononeuropathies
Short Description
Other specified mononeuropathies
Same as the full description in the CMS dataset.
Parent Code
G58
Other mononeuropathies

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG50-G59Nerve, nerve root and plexus disorders
CategoryG58Other mononeuropathies
This CodeG58.8Other specified mononeuropathies

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abdominal cutaneous nerve entrapment syndrome
  • Bilateral neuralgia of pudendal nerves
  • Cervicobrachial neuralgia
  • Chronic chest pain
  • Compression neuropathy of trunk
  • Corneal nerve finding
  • Corneal nerves inflamed
  • Cruralgia
  • Disorder of nerve repair
  • Embolic infarction
  • Embolic infarction of nerve trunk
  • Entrapment syndrome due to amyloid
  • Finding of sensation of testes
  • Iliohypogastric nerve neuralgia
  • Intercostal neuropathy
  • Ischemic neuropathy due to arterial steal
  • Ischemic peripheral neuropathy
  • Long thoracic nerve lesion
  • Multiple entrapment syndrome
  • Nervous system complication from surgically implanted device
  • Neuralgia of left pudendal nerve
  • Neuralgia of right pudendal nerve
  • Pain in testicle
  • Palsy of upper motor nerve
  • Peripheral nerve entrapment syndrome
  • Peripheral neuropathy due to inflammation
  • Phrenic nerve disorder
  • Phrenic nerve entrapment syndrome
  • Phrenic nerve lesion
  • Pudendal neuralgia
  • Stimulation of phrenic nerve as complication of implantation of automatic cardiac defibrillator
  • Stimulation of phrenic nerve as complication of implantation of cardiac pacemaker
  • Testicular neuralgia
  • Tibial nerve palsy
  • Tourniquet palsy
  • Vasculitic neuropathy

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.

    • Disorder(of)
      • nerve
        • phrenic
    • Disorder(of)
      • nerve
        • specified NEC
    • Mononeuritis
      • specified NEC
    • Mononeuropathy
      • specified NEC
    • Neuralgia, neuralgic(acute)
      • specified nerve NEC
    • Neuritis(rheumatoid)
      • specified nerve NEC
    • Neuroma
      • interdigital
    • Palsy
      • nerve
        • specified NEC

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

  • Pudendal Neuralgia

    pain associated with a damaged pudendal nerve. clinical features may include positional pain with sitting in the perineal and genital areas, sexual dysfunction and fecal incontinence and urinary incontinence.

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 G58.8 to ICD-9-CMHistory

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

ICD-9-CM
355.9 Mononeuritis NOS
Approximate The match is approximate rather than exact.

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 G58.8Overview

Is G58.8 (Other mononeuropathies) a billable code?

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

What is the ICD-9 equivalent of G58.8?

Under the General Equivalence Mappings, other specified mononeuropathies converts to ICD-9-CM 355.9 (mononeuritis NOS). The mapping is approximate, so confirm the match fits the documentation.

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.