ICD-10 Code G46 – Vascular syndromes of brain in cerebrovascular diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G46 – Vascular syndromes of brain in cerebrovascular diseases
What it is
G46 identifies vascular brain syndromes that occur as a result of cerebrovascular disease. Use it when documentation describes a specific brain syndrome linked to impaired blood flow or a prior cerebrovascular event.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include focal neurologic deficits, language disturbance, visual field loss, weakness, or other signs consistent with a vascular brain syndrome.
When to use this code
Use G46 when the provider documents a vascular syndrome of the brain and ties it to cerebrovascular disease. It may apply when the record describes a recognized neurologic syndrome rather than a nonspecific stroke history. Check documentation for the exact syndrome and causal wording.
Do not use for
Do not use G46 for vague cerebrovascular symptoms without a documented vascular syndrome. Avoid it when the chart only supports acute stroke, transient ischemic attack, or another more specific diagnosis.
Coding tip
Assign the code only when the provider clearly links the brain syndrome to cerebrovascular disease.