2026 ICD-10-CM Diagnosis Code I67.9Cerebrovascular disease, unspecified

ICD-10-CM Codes›I00–I99›I60-I69›I67

ICD-10-CM I67.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I67.9 is a billable ICD-10-CM diagnosis code for cerebrovascular disease, unspecified. 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 Other and ill-defined cerebrovascular disease.

Code Identity

ICD-10-CM Code
I67.9
Billable Status
Yes — Valid for Submission
Code Describes
Cerebrovascular disease, unspecified
Short Description
Cerebrovascular disease, unspecified
Same as the full description in the CMS dataset.
Parent Code
I67
Other cerebrovascular diseases

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI60-I69Cerebrovascular diseases
CategoryI67Other cerebrovascular diseases
This CodeI67.9Cerebrovascular disease, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute vestibular syndrome
  • Acute vestibular syndrome due to cerebrovascular disease
  • Asymptomatic cerebrovascular disease
  • Cerebrovascular abnormality due to Takayasu disease
  • Cerebrovascular disease
  • Cerebrovascular disease due to late-delayed irradiation of brain
  • Cerebrovascular disorder due to paradoxical embolus
  • Cerebrovascular disorder in the puerperium
  • Diffuse cerebrovascular disease
  • Disorder of basilar artery
  • Disorder of intracranial venous sinus
  • Hydrocephalus ex vacuo
  • Hydrocephalus ex vacuo due to cerebrovascular disease
  • Post-radiotherapy cerebral vasculopathy
  • Small vessel cerebrovascular disease

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.

    • Angiopathia, angiopathy
      • cerebral
    • Degeneration, degenerative
      • brain (cortical) (progressive)
        • in
          • cerebrovascular disease
    • Degeneration, degenerative
      • cerebrovascular
    • Depression(acute) (mental)
      • cerebrovascular
    • Disease, diseased
      • artery
        • cerebral
    • Disease, diseased
      • brain
        • arterial, artery
    • Disease, diseased
      • cerebrovascular
    • Failure, failed
      • cerebrovascular
    • Lesion(s) (nontraumatic)
      • brain
        • vascular
    • Lesion(s) (nontraumatic)
      • brain
        • vascular
          • degenerative
    • Lesion(s) (nontraumatic)
      • cerebrovascular
    • Lesion(s) (nontraumatic)
      • cerebrovascular
        • degenerative
    • Lesion(s) (nontraumatic)
      • vascular
        • affecting central nervous system

Clinical ClassificationClinical

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

CCSR CIR024
Other and ill-defined cerebrovascular disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Brain Diseases

Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body.

Read the full article at MedlinePlus

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

Convert I67.9 to ICD-9-CMHistory

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

ICD-9-CM
437.9 Cerebrovasc disease NOS
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 I67.9Overview

Is I67.9 (Other cerebrovascular diseases) a billable code?

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

What is the ICD-9 equivalent of I67.9?

Under the General Equivalence Mappings, cerebrovascular disease, unspecified converts to ICD-9-CM 437.9 (cerebrovasc disease NOS). 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.