2026 ICD-10-CM Diagnosis Code I67.6Nonpyogenic thrombosis of intracranial venous system

ICD-10-CM Codes›I00–I99›I60-I69›I67

ICD-10-CM I67.6
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I67.6 is a billable ICD-10-CM diagnosis code for nonpyogenic thrombosis of intracranial venous system. 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
I67.6
Billable Status
Yes — Valid for Submission
Code Describes
Nonpyogenic thrombosis of intracranial venous system
Short Description
Nonpyogenic thrombosis of intracranial venous system
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 CodeI67.6Nonpyogenic thrombosis of intracranial venous system

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Benign intracranial hypertension
  • Benign intracranial hypertension due to thrombus of intracranial vein
  • Cerebral vein occlusion
  • Cerebral venous thrombosis of cortical vein
  • Cerebral venous thrombosis of cortical vein without infarction
  • Cerebral venous thrombosis of great cerebral vein
  • Cerebral venous thrombosis of straight sinus
  • Embolism of intracranial venous sinus
  • Embolism of superior sagittal sinus
  • Embolism of torcular Herophili
  • Nonpyogenic thrombosis of intracranial venous sinus
  • Occlusion of cerebral vein by nonpyogenic thrombus
  • Rolandic vein occlusion syndrome
  • Thrombosis of basal vein
  • Thrombosis of cerebral veins
  • Thrombosis of multiple cerebral veins
  • Thrombosis of superior anastomotic vein
  • Thrombosis of torcular Herophili
  • Thrombus of intracranial vein

Tabular List NotesGuidance

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

Inclusion Terms

  • Nonpyogenic thrombosis of cerebral vein
  • Nonpyogenic thrombosis of intracranial venous sinus

Type 1 Excludes

  • nonpyogenic thrombosis of intracranial venous system causing infarction I63.6

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.

    • Embolism(multiple) (paradoxical)
      • intracranial
        • venous sinus (any)
          • nonpyogenic
    • Phlebitis(infective) (pyemic) (septic) (suppurative)
      • intracranial (venous) sinus (any)
        • nonpyogenic
    • Thrombophlebitis
      • cavernous (venous) sinus
        • nonpyogenic
    • Thrombophlebitis
      • cerebral (sinus) (vein)
        • nonpyogenic
    • Thrombophlebitis
      • intracranial venous sinus (any)
        • nonpyogenic
    • Thrombophlebitis
      • lateral (venous) sinus
        • nonpyogenic
    • Thrombophlebitis
      • longitudinal (venous) sinus
        • nonpyogenic
    • Thrombophlebitis
      • sinus (intracranial)
        • nonpyogenic
    • Thrombosis, thrombotic(bland) (multiple) (progressive) (silent) (vessel)
      • intracranial (arterial)
        • venous sinus (any)
          • nonpyogenic
    • Thrombosis, thrombotic(bland) (multiple) (progressive) (silent) (vessel)
      • intracranial (arterial)
        • venous sinus (any)
          • nonpyogenic origin
    • Thrombosis, thrombotic(bland) (multiple) (progressive) (silent) (vessel)
      • vein (acute)
        • cerebral, nonpyogenic

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 I67.6 to ICD-9-CMHistory

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

ICD-9-CM
437.6 Nonpyogen thrombos sinus
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 I67.6Overview

Is I67.6 (Other cerebrovascular diseases) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report nonpyogenic thrombosis of intracranial venous system on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of I67.6?

Under the General Equivalence Mappings, nonpyogenic thrombosis of intracranial venous system converts to ICD-9-CM 437.6 (nonpyogen thrombos sinus). 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.