2026 ICD-10-CM Diagnosis Code G80.4Ataxic cerebral palsy

ICD-10-CM Codes›G00–G99›G80-G83›G80

ICD-10-CM G80.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G80.4 is a billable ICD-10-CM diagnosis code for ataxic cerebral palsy. 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 Cerebral palsy.

Code Identity

ICD-10-CM Code
G80.4
Billable Status
Yes — Valid for Submission
Code Describes
Ataxic cerebral palsy
Short Description
Ataxic cerebral palsy
Same as the full description in the CMS dataset.
Parent Code
G80
Cerebral palsy

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG80-G83Cerebral palsy and other paralytic syndromes
CategoryG80Cerebral palsy
This CodeG80.4Ataxic cerebral palsy

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Ataxic cerebral palsy
  • Cerebral ataxia
  • Cerebral paralysis with homolateral ataxia
  • Cerebral paresis with homolateral ataxia
  • Non-progressive cerebellar ataxia
  • Non-spastic cerebral palsy

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.

    • Diataxia, cerebral
    • Palsy
      • cerebral (congenital)
        • ataxic

Clinical ClassificationClinical

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

CCSR NVS007
Cerebral palsy
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Ataxic Cerebral Palsy

    the least common subtype of cerebral palsy, in which the individual displays hypotonia, a loss of motor coordination, and an intention tremor. individuals with ataxic cerebral palsy walk very unsteadily, with a wide-based gait.

Patient EducationClinical

Cerebral Palsy

Cerebral palsy (CP) is a group of neurologic disorders that cause problems with movement, balance, and posture. The first part of the name, cerebral, means having to do with the brain. The second part, palsy, means weakness or problems with using the muscles.

The full article covers:

  • What is cerebral palsy (CP)?
  • What are the types of cerebral palsy (CP)?
  • What causes cerebral palsy (CP)?
  • Who is more likely to develop cerebral palsy (CP)?
  • What are the signs of cerebral palsy (CP)?
  • How is cerebral palsy (CP) diagnosed?
  • What are the treatments for cerebral palsy (CP)?
  • Can cerebral palsy (CP) be prevented?

Read the full article at MedlinePlus

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

Convert G80.4 to ICD-9-CMHistory

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

ICD-9-CM
343.8 Cerebral palsy 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 G80.4Overview

Is G80.4 (Cerebral palsy) a billable code?

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

What is the ICD-9 equivalent of G80.4?

Under the General Equivalence Mappings, ataxic cerebral palsy converts to ICD-9-CM 343.8 (cerebral palsy 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.