2026 ICD-10-CM Diagnosis Code I67.81Acute cerebrovascular insufficiency

ICD-10-CM Codes›I00–I99›I60-I69›I67

ICD-10-CM I67.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I67.81 is a billable ICD-10-CM diagnosis code for acute cerebrovascular insufficiency. 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
I67.81
Billable Status
Yes — Valid for Submission
Code Describes
Acute cerebrovascular insufficiency
Short Description
Acute cerebrovascular insufficiency
Same as the full description in the CMS dataset.
Parent Code
I67.8
Other specified cerebrovascular diseases

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI60-I69Cerebrovascular diseases
CategoryI67Other cerebrovascular diseases
This CodeI67.81Acute cerebrovascular insufficiency

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute cerebrovascular insufficiency
  • Leuko-araiosis

Tabular List NotesGuidance

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

Inclusion Terms

  • Acute cerebrovascular insufficiency unspecified as to location or reversibility

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.

    • Insufficiency, insufficient
      • arterial
        • cerebral
    • Insufficiency, insufficient
      • cerebrovascular (acute)
    • Leukoaraiosis(hypertensive)

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

Ischemic Stroke

A stroke happens when there is a loss of blood flow to part of the brain. Your brain cells cannot get the oxygen and nutrients they need from blood, and they start to die within a few minutes. This can cause lasting brain damage, long-term disability, or even death.

The full article covers:

  • What is an ischemic stroke?
  • What causes an ischemic stroke?
  • What are the symptoms of ischemic stroke?
  • How is an ischemic stroke diagnosed?
  • How is an ischemic stroke treated?
  • Can an ischemic stroke be prevented?

Read the full article at MedlinePlus

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

Convert I67.81 to ICD-9-CMHistory

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

ICD-9-CM
437.1 Ac cerebrovasc insuf NOS
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 I67.81Overview

Is I67.81 (Other specified cerebrovascular diseases) a billable code?

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

What is the ICD-9 equivalent of I67.81?

Under the General Equivalence Mappings, acute cerebrovascular insufficiency converts to ICD-9-CM 437.1 (ac cerebrovasc insuf NOS). 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.