ICD-10 Code I63.11 – Cerebral infarction due to embolism of vertebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.11 – Cerebral infarction due to embolism of vertebral artery
What it is
This code identifies an ischemic stroke caused by an embolus blocking a vertebral artery. Use it when documentation states the infarction is due to embolism in the vertebral artery territory.
Clinical signs
Findings may include sudden neurologic deficits consistent with posterior circulation stroke, such as dizziness, ataxia, diplopia, dysarthria, or unilateral weakness. Clinical features vary; refer to documentation.
When to use this code
Use I63.11 when the provider documents cerebral infarction due to embolism of a vertebral artery, including confirmed embolic stroke affecting that vessel. It is appropriate when imaging or clinical assessment supports infarction and the source is specified as embolic.
Do not use for
Do not use this code for hemorrhagic stroke, transient ischemic attack, or infarction from thrombosis, stenosis, or unspecified occlusion. Check documentation if the artery involved or stroke mechanism is not clearly stated.
Coding tip
Code the stroke mechanism and vessel exactly as documented; if embolic source details are unclear, query the provider.