Other cerebrovascular diseases (I67) ICD-10-CM
The I67 code range covers other cerebrovascular diseases with 21 ICD-10-CM diagnosis codes. 17 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- Occlusion and stenosis of cerebral artery causing cerebral infarction I63.3 I63.5
- Occlusion and stenosis of precerebral artery causing cerebral infarction I63.2
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- sequelae of the listed conditions I69.8
Codes in the I67 Range 21 codes · 17 billable
- I67 Other cerebrovascular diseasesNon-billable
- I67.0 Dissection of cerebral arteries, nonruptured
- I67.1 Cerebral aneurysm, nonruptured
- I67.2 Cerebral atherosclerosis
- I67.3 Progressive vascular leukoencephalopathy
- I67.4 Hypertensive encephalopathy
- I67.5 Moyamoya disease
- I67.6 Nonpyogenic thrombosis of intracranial venous system
- I67.7 Cerebral arteritis, not elsewhere classified
- I67.8 Other specified cerebrovascular diseasesNon-billable
- I67.81 Acute cerebrovascular insufficiency
- I67.82 Cerebral ischemia
- I67.83 Posterior reversible encephalopathy syndrome
- I67.84 Cerebral vasospasm and vasoconstrictionNon-billable
- I67.841 Reversible cerebrovascular vasoconstriction syndrome
- I67.848 Other cerebrovascular vasospasm and vasoconstriction
- I67.85 Hereditary cerebrovascular diseasesNon-billable
- I67.850 Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy
- I67.858 Other hereditary cerebrovascular disease
- I67.89 Other cerebrovascular disease
- I67.9 Cerebrovascular disease, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the I67 range.
CADASIL
A familial, cerebral arteriopathy mapped to chromosome 19q12, and characterized by the presence of granular deposits in small CEREBRAL ARTERIES producing ischemic STROKE; PSEUDOBULBAR PALSY; and multiple subcortical infarcts (CEREBRAL INFARCTION). CADASIL is an acronym for Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy. CADASIL differs from BINSWANGER DISEASE by the presence of MIGRAINE WITH AURA and usually by the lack of history of arterial HYPERTENSION. (From Bradley et al, Neurology in Clinical Practice, 2000, p1146)
Cerebral Aneurysm
A balloon type pouch or bulge in the wall of a cerebral blood vessel.
Cerebral Atherosclerosis
Atherosclerosis of the cerebral vasculature.
Cerebral Infarction
An ischemic condition of the brain, producing a persistent focal neurological deficit in the area of distribution of the cerebral arteries.
Cerebrovascular Disorders
A spectrum of pathological conditions of impaired blood flow in the brain. They can involve vessels (ARTERIES or VEINS) in the CEREBRUM, the CEREBELLUM, and the BRAIN STEM. Major categories include INTRACRANIAL ARTERIOVENOUS MALFORMATIONS; BRAIN ISCHEMIA; CEREBRAL HEMORRHAGE; and others.
Hypertensive Encephalopathy
Brain dysfunction or damage resulting from sustained MALIGNANT HYPERTENSION. When BLOOD PRESSURE exceeds the limits of cerebral autoregulation, cerebral blood flow is impaired (BRAIN ISCHEMIA). Clinical manifestations include HEADACHE; NAUSEA; VOMITING; SEIZURES; altered mental status (in some cases progressing to COMA); PAPILLEDEMA; and RETINAL HEMORRHAGE.
Leukoaraiosis
Non-specific white matter changes in the BRAIN, often seen after age 65. Changes include loss of AXONS; MYELIN pallor, GLIOSIS, loss of ependymal cells, and enlarged perivascular spaces. Leukoaraiosis is a risk factor for DEMENTIA and CEREBROVASCULAR DISORDERS.
Moyamoya Disease
A noninflammatory, progressive occlusion of the intracranial CAROTID ARTERIES and the formation of netlike collateral arteries arising from the CIRCLE OF WILLIS. Cerebral angiogram shows the puff-of-smoke (moyamoya) collaterals at the base of the brain. It is characterized by endothelial HYPERPLASIA and FIBROSIS with thickening of arterial walls. This disease primarily affects children but can also occur in adults.
Reversible Posterior Leukoencephalopathy Syndrome
An acute or subacute reversible condition characterized by headaches, mental status changes, visual disturbances, and seizures associated with imaging findings of posterior leukoencephalopathy. It has been observed in association with hypertensive encephalopathy, eclampsia, and immunosuppressive and cytotoxic drug treatment.
About the I67 Code Range
These conditions affect blood vessels in the brain. The subdivisions distinguish specific artery and vein conditions, blood-flow problems, and named diseases.
Some codes identify an artery dissection or aneurysm without rupture, a clot in veins inside the skull, or disease linked to high blood pressure. Within I67.8, the subdivisions separate insufficient blood flow, brain ischemia, vessel spasm or narrowing, hereditary disease, and other specified conditions. The vessel spasm or narrowing branch distinguishes reversible cerebrovascular vasoconstriction syndrome from other forms. The hereditary branch distinguishes a named disorder from other hereditary cerebrovascular diseases. I67.9 identifies cerebrovascular disease without a specified type.
Questions About This Page
How many billable codes are in the I67 range?
Of the 21 codes in this range, 17 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the I67 range classify?
The range classifies other cerebrovascular diseases. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
