2026 ICD-10-CM Diagnosis Code G64Other disorders of peripheral nervous system

ICD-10-CM Codes›G00–G99›G60-G65›G64

ICD-10-CM G64
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G64 is a billable ICD-10-CM diagnosis code for other disorders of peripheral nervous system. 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 Other nervous system disorders (neither hereditary nor degenerative).

Code Identity

ICD-10-CM Code
G64
Billable Status
Yes — Valid for Submission
Code Describes
Other disorders of peripheral nervous system
Chapter
G60-G65
Polyneuropathies and other disorders of the peripheral nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG60-G65Polyneuropathies and other disorders of the peripheral nervous system
CategoryG64Other disorders of peripheral nervous system
This CodeG64Other disorders of peripheral nervous system

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired demyelinating disorder of peripheral nerve
  • Bacterial infection of peripheral nerve
  • Dermatosis secondary to peripheral nerve disorder
  • Disorder of peripheral nervous system co-occurrent with human immunodeficiency virus infection
  • Disorder of the peripheral nervous system
  • Dystonia due to disorder of peripheral nervous system
  • EMILIN-1-related connective tissue disease
  • Infection of peripheral nerve
  • Neurological dysfunction due to obstetric fistula
  • Neurotrophic damage to skin
  • Parasitic infection of peripheral nerve
  • Peripheral nerve disease
  • Peripheral nerve disorder associated with repair of hernia
  • Skin damage resulting from acquired nerve disorder
  • Viral infection of peripheral nerve

Tabular List NotesGuidance

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

Inclusion Terms

  • Disorder of peripheral nervous system NOS

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)
      • peripheral nervous system NEC

Clinical ClassificationClinical

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

CCSR NVS020
Other nervous system disorders (neither hereditary nor degenerative)
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 G64 to ICD-9-CMHistory

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

ICD-9-CM
357.89 Inflam/tox neuropthy NEC
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 G64Overview

Is G64 (Other disorders of peripheral nervous system) a billable code?

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

What is the ICD-9 equivalent of G64?

Under the General Equivalence Mappings, other disorders of peripheral nervous system converts to ICD-9-CM 357.89 (inflam/tox neuropthy NEC). 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.