ICD-10 Code I67.84 – Cerebral vasospasm and vasoconstriction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I67.84 – Cerebral vasospasm and vasoconstriction
What it is
I67.84 identifies abnormal narrowing of the cerebral blood vessels due to spasm or constriction. Use it when documentation specifically describes cerebral vasospasm or vasoconstriction affecting brain circulation.
Clinical signs
Clinical features vary; refer to documentation. Commonly, notes may describe reduced cerebral blood flow, neurologic deficits, headache, or imaging evidence of vessel narrowing.
When to use this code
Use this code when the provider documents cerebral vasospasm or vasoconstriction as the diagnosis, including cases identified on imaging or during neurologic evaluation. It may appear in records after subarachnoid hemorrhage or other cerebrovascular events, but only code it when the condition is clearly stated.
Do not use for
Do not use I67.84 for nonspecific headache, general vascular disease, or peripheral vasospasm. Check documentation if the record mentions vasospasm without specifying the cerebral vessels.
Coding tip
Code I67.84 only when the provider links the spasm or constriction to the cerebral circulation, not when it is merely suspected or implied.