2026 ICD-10-CM Diagnosis Code G62.81Critical illness polyneuropathy

ICD-10-CM Codes›G00–G99›G60-G65›G62

ICD-10-CM G62.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G62.81 is a billable ICD-10-CM diagnosis code for critical illness polyneuropathy. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as acute motor axonal neuropathy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Polyneuropathies.

Code Identity

ICD-10-CM Code
G62.81
Billable Status
Yes — Valid for Submission
Code Describes
Critical illness polyneuropathy
Short Description
Critical illness polyneuropathy
Same as the full description in the CMS dataset.
Parent Code
G62.8
Other specified polyneuropathies

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG60-G65Polyneuropathies and other disorders of the peripheral nervous system
CategoryG62Other and unspecified polyneuropathies
This CodeG62.81Critical illness polyneuropathy

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute motor axonal neuropathy
  • Acute motor sensory axonal neuropathy
  • Critical illness polyneuropathy
  • Guillain-Barré syndrome

Tabular List NotesGuidance

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

Inclusion Terms

  • Acute motor 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.

    • Neuropathy, neuropathic
      • acute motor
    • Neuropathy, neuropathic
      • progressive
        • inflammatory
    • Polyneuropathy(peripheral)
      • critical illness

Clinical ClassificationClinical

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

CCSR NVS015
Polyneuropathies
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 G62.81 to ICD-9-CMHistory

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

ICD-9-CM
357.82 Crit illness neuropathy
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 G62.81Overview

Is G62.81 (Other specified polyneuropathies) a billable code?

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

What is the ICD-9 equivalent of G62.81?

Under the General Equivalence Mappings, critical illness polyneuropathy converts to ICD-9-CM 357.82 (crit illness neuropathy). 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.