ICD-10 Code I67.85 – Hereditary cerebrovascular diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I67.85 – Hereditary cerebrovascular diseases
What it is
This code identifies inherited disorders that affect the brain’s blood vessels. Use it when documentation states a hereditary cerebrovascular disease or a similar genetic vascular condition.
Clinical signs
Clinical features vary; refer to documentation. Patients may have recurrent stroke-like events, headaches, seizures, cognitive changes, or other neurologic deficits linked to inherited cerebrovascular disease.
When to use this code
Use I67.85 when the provider documents a hereditary or familial cerebrovascular disorder as the diagnosis. It may apply during neurologic evaluation, genetic workup, or follow-up care for a known inherited vascular condition. If the record only describes nonspecific cerebrovascular disease, check documentation before assigning this code.
Do not use for
Do not use this code for acquired stroke, transient ischemic attack, or routine atherosclerotic cerebrovascular disease. If the chart does not clearly identify a hereditary cause, check documentation.
Coding tip
Code from the provider’s documented genetic or familial diagnosis, not from symptoms alone.