ICD-10 Code I65.0 – Occlusion and stenosis of vertebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I65.0 – Occlusion and stenosis of vertebral artery
What it is
This code identifies narrowing or blockage of a vertebral artery, one of the vessels that supplies blood to the brain. It is used when the provider documents vertebral artery occlusion or stenosis.
Clinical signs
Clinical features vary; refer to documentation. Patients may have symptoms of posterior circulation ischemia, but imaging or vascular studies usually confirm the arterial narrowing or occlusion.
When to use this code
Use I65.0 when the record specifically states occlusion or stenosis of a vertebral artery. Code it when the condition is documented as the reason for evaluation, follow-up, or management, and the affected artery is clearly identified.
Do not use for
Do not use this code for vertebral artery dissection, embolism, or nonspecific cerebrovascular disease unless the provider documents vertebral artery occlusion or stenosis. Check documentation if the site or cause is unclear.
Coding tip
Verify laterality and exact vessel wording in the report, and code only when vertebral artery stenosis or occlusion is explicitly documented.