2026 ICD-10-CM Diagnosis Code I67.1Cerebral aneurysm, nonruptured

ICD-10-CM Codes›I00–I99›I60-I69›I67

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

I67.1 is a billable ICD-10-CM diagnosis code for cerebral aneurysm, nonruptured. 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
I67.1
Billable Status
Yes — Valid for Submission
Code Describes
Cerebral aneurysm, nonruptured
Short Description
Cerebral aneurysm, nonruptured
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 CodeI67.1Cerebral aneurysm, nonruptured

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired aneurysm of cerebral artery
  • Acquired arteriovenous fistula
  • Acquired arteriovenous fistula of dura of cerebrum
  • Acquired caroticocavernous sinus fistula
  • Aneurysm of anterior cerebral artery
  • Aneurysm of anterior communicating artery
  • Aneurysm of cerebral artery
  • Aneurysm of extracranial portion of internal carotid artery
  • Aneurysm of head and neck artery
  • Aneurysm of internal carotid artery
  • Aneurysm of internal carotid bifurcation
  • Aneurysm of internal carotid-anterior communicating artery zone
  • Aneurysm of internal carotid-posterior communicating artery zone
  • Aneurysm of intracranial artery
  • Aneurysm of intracranial portion of internal carotid artery
  • Aneurysm of intracranial portion of left internal carotid artery
  • Aneurysm of intracranial portion of right internal carotid artery
  • Aneurysm of intracranial vein
  • Aneurysm of left carotid artery
  • Aneurysm of left internal carotid artery
  • Aneurysm of middle cerebral artery
  • Aneurysm of posterior cerebral artery
  • Aneurysm of posterior communicating artery
  • Aneurysm of posterior inferior cerebellar artery
  • Aneurysm of right carotid artery
  • Aneurysm of right internal carotid artery
  • Aneurysm of the vein of Galen
  • Aspergillus mycotic cerebral aneurysm
  • Berry aneurysm
  • Carotid cavernous fistula
  • Cerebral aneurysm due to dissection of cerebral artery
  • Dural arteriovenous fistula
  • Familial cerebral saccular aneurysm
  • Intracranial aneurysm
  • Multiple aneurysms of cerebral artery
  • Spontaneous caroticocavernous sinus fistula

Tabular List NotesGuidance

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

Inclusion Terms

  • Cerebral aneurysm NOS
  • Cerebral arteriovenous fistula, acquired
  • Internal carotid artery aneurysm, intracranial portion
  • Internal carotid artery aneurysm, NOS

Type 1 Excludes

  • congenital cerebral aneurysm, nonruptured Q28
  • ruptured cerebral aneurysm I60.7

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.

    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • arteriosclerotic
        • cerebral
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • arteriovenous (congenital)
        • acquired
          • brain
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • berry (congenital) (nonruptured)
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • brain
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • brain
        • arteriosclerotic
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • brain
        • arteriovenous (congenital) (nonruptured)
          • acquired
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • brain
        • berry (congenital) (nonruptured)
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • brain
        • meninges
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • brain
        • miliary (congenital) (nonruptured)
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • brain
        • mycotic
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • carotid artery (common) (external)
        • internal (intracranial)
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • cavernous sinus
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • circle of Willis
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • miliary (congenital)
    • Fistula(cutaneous)
      • arteriovenous (acquired) (nonruptured)
        • brain
    • Fistula(cutaneous)
      • brain
        • arteriovenous (acquired)

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

Clinical InformationClinical

  • Intracranial Aneurysm

    abnormal outpouching in the wall of intracranial blood vessels. most common are the saccular (berry) aneurysms located at branch points in circle of willis at the base of the brain. vessel rupture results in subarachnoid hemorrhage or intracranial hemorrhages. giant aneurysms (>2.5 cm in diameter) may compress adjacent structures, including the oculomotor nerve. (from adams et al., principles of neurology, 6th ed, p841)

  • Intracranial Aneurysm

    a congenital or acquired aneurysm within the cranium.

Patient EducationClinical

Brain Aneurysm

A brain aneurysm is an abnormal bulge or "ballooning" in the wall of an artery in the brain. They are sometimes called berry aneurysms because they are often the size of a small berry. Most brain aneurysms produce no symptoms until they become large, begin to leak blood, or burst.

Read the full article at MedlinePlus

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

Convert I67.1 to ICD-9-CMHistory

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

ICD-9-CM
437.3 Nonrupt cerebral aneurym
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 I67.1Overview

Is I67.1 (Other cerebrovascular diseases) a billable code?

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

What is the ICD-9 equivalent of I67.1?

Under the General Equivalence Mappings, cerebral aneurysm, nonruptured converts to ICD-9-CM 437.3 (nonrupt cerebral aneurym). 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.