ICD-10 Code I63.113 – Cerebral infarction due to embolism of bilateral vertebral arteries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.113 – Cerebral infarction due to embolism of bilateral vertebral arteries
What it is
This code identifies an ischemic stroke caused by an embolus blocking both vertebral arteries, reducing blood flow to the posterior brain. Use it when documentation specifically states bilateral vertebral artery embolism with cerebral infarction.
Clinical signs
Clinical features may include sudden dizziness, vertigo, ataxia, double vision, dysarthria, or other posterior circulation stroke findings. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents cerebral infarction due to embolism involving both vertebral arteries. It is appropriate when imaging, neurology notes, or discharge summaries support an embolic ischemic stroke in the vertebrobasilar territory. If the side or vessel is not clearly documented, check documentation before assigning this code.
Do not use for
Do not use it for hemorrhagic stroke, transient ischemic attack, or infarction from thrombosis or unspecified occlusion. Also avoid it when only vertebral artery stenosis or embolism without infarction is documented.
Coding tip
Code the documented vessel and mechanism exactly; if bilateral vertebral involvement is not explicit, do not assume it.