2026 ICD-10-CM Diagnosis Code G65.1Sequelae of other inflammatory polyneuropathy

ICD-10-CM Codes›G00–G99›G60-G65›G65

ICD-10-CM G65.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G65.1 is a billable ICD-10-CM diagnosis code for sequelae of other inflammatory polyneuropathy. 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 Sequela of specified nervous system conditions.

Code Identity

ICD-10-CM Code
G65.1
Billable Status
Yes — Valid for Submission
Code Describes
Sequelae of other inflammatory polyneuropathy
Short Description
Sequelae of other inflammatory polyneuropathy
Same as the full description in the CMS dataset.
Parent Code
G65
Sequelae of inflammatory and toxic polyneuropathies

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG60-G65Polyneuropathies and other disorders of the peripheral nervous system
CategoryG65Sequelae of inflammatory and toxic polyneuropathies
This CodeG65.1Sequelae of other inflammatory polyneuropathy

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.

    • Polyneuropathy(peripheral)
      • inflammatory
        • sequelae

Clinical ClassificationClinical

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

CCSR NVS022
Sequela of specified nervous system conditions
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 G65.1 to ICD-9-CMHistory

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

ICD-9-CM
357.4 Neuropathy in other dis
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 G65.1Overview

Is G65.1 (Sequelae of inflammatory and toxic polyneuropathies) a billable code?

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

What is the ICD-9 equivalent of G65.1?

Under the General Equivalence Mappings, sequelae of other inflammatory polyneuropathy converts to ICD-9-CM 357.4 (neuropathy in other dis). The mapping is approximate, so confirm the match fits the documentation.

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.