ICD-10 Code I63.011 – Cerebral infarction due to thrombosis of right vertebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.011 – Cerebral infarction due to thrombosis of right vertebral artery
What it is
This code identifies an ischemic stroke caused by a blood clot blocking the right vertebral artery. The blockage reduces blood flow to parts of the brain supplied by that artery.
Clinical signs
Findings may include sudden dizziness, vertigo, gait unsteadiness, visual disturbance, dysarthria, or limb weakness. Clinical features vary; refer to documentation and imaging that supports an acute cerebral infarction.
When to use this code
Use I63.011 when the provider documents cerebral infarction due to thrombosis of the right vertebral artery. It is appropriate when the stroke mechanism and laterality are clearly stated in the record. If the documentation only says ischemic stroke or posterior circulation infarct, check documentation for the specific vessel cause.
Do not use for
Do not use this code for vertebral artery stenosis without infarction, embolic stroke, or infarction from an unspecified vertebral artery. If the cause or side is not documented, use a more general code only when supported by the record.
Coding tip
Confirm both thrombosis and right-sided vertebral artery involvement in the provider note before assigning this code.