2026 ICD-10-CM Diagnosis Code G25.82Stiff-man syndrome

ICD-10-CM Codes›G00–G99›G20-G26›G25

ICD-10-CM G25.82
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G25.82 is a billable ICD-10-CM diagnosis code for stiff-man syndrome. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as disorders of spinal neurones manifest by hyperactivity. 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
G25.82
Billable Status
Yes — Valid for Submission
Code Describes
Stiff-man syndrome
Short Description
Stiff-man syndrome
Same as the full description in the CMS dataset.
Parent Code
G25.8
Other specified extrapyramidal and movement disorders

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG20-G26Extrapyramidal and movement disorders
CategoryG25Other extrapyramidal and movement disorders
This CodeG25.82Stiff-man syndrome

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorders of spinal neurones manifest by hyperactivity
  • Stiff-person syndrome

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.

    • Stiff-man syndrome
    • Syndrome
      • stiff man

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 Yes · outpatient Yes

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Convert G25.82 to ICD-9-CMHistory

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

ICD-9-CM
333.91 Stiff-man syndrome
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 G25.82Overview

Is G25.82 (Other specified extrapyramidal and movement disorders) a billable code?

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

What is the ICD-9 equivalent of G25.82?

Under the General Equivalence Mappings, stiff-man syndrome converts to ICD-9-CM 333.91 (stiff-man syndrome). 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.