2026 ICD-10-CM Diagnosis Code G26Extrapyramidal and movement disorders in diseases classified elsewhere

ICD-10-CM Codes›G00–G99›G20-G26›G26

ICD-10-CM G26
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G26 is a billable ICD-10-CM diagnosis code for extrapyramidal and movement disorders in diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other nervous system disorders (often hereditary or degenerative).

Code Identity

ICD-10-CM Code
G26
Billable Status
Yes — Valid for Submission
Code Describes
Extrapyramidal and movement disorders in diseases classified elsewhere
Chapter
G20-G26
Extrapyramidal and movement disorders

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG20-G26Extrapyramidal and movement disorders
CategoryG26Extrapyramidal and movement disorders in diseases classified elsewhere
This CodeG26Extrapyramidal and movement disorders in diseases classified elsewhere

Code EditsBilling

Medicare Code Editor checks that affect claim validity for G26.

Manifestation diagnoses
Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis.

Tabular List NotesGuidance

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

Code First

  • underlying disease

Clinical ClassificationClinical

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

CCSR NVS006
Other nervous system disorders (often hereditary or degenerative)
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Movement Disorders

Movement disorders are neurologic conditions that cause problems with movement, such as:

Read the full article at MedlinePlus

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Convert G26 to ICD-9-CMHistory

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

ICD-9-CM
333.99 Extrapyramidal dis 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 G26Overview

Is G26 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report extrapyramidal and movement disorders in diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can G26 be a principal diagnosis?

No. This is a manifestation code: extrapyramidal and movement disorders in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.

What is the ICD-9 equivalent of G26?

Under the General Equivalence Mappings, extrapyramidal and movement disorders in diseases classified elsewhere converts to ICD-9-CM 333.99 (extrapyramidal dis 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.