ICD-10 Code I63.213 – Cerebral infarction due to unspecified occlusion or stenosis of bilateral vertebral arteries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.213 – Cerebral infarction due to unspecified occlusion or stenosis of bilateral vertebral arteries
What it is
This code identifies an ischemic stroke caused by reduced blood flow in both vertebral arteries, with the occlusion or stenosis not otherwise specified. Use it when the infarction is documented as involving the bilateral vertebral arteries.
Clinical signs
Clinical features vary; refer to documentation. Typical stroke findings may include sudden neurologic deficits such as dizziness, ataxia, dysarthria, visual changes, weakness, or sensory loss, depending on the affected brain region.
When to use this code
Use I63.213 when the provider documents cerebral infarction linked to unspecified occlusion or stenosis of both vertebral arteries. It fits confirmed ischemic stroke cases where the arterial lesion is bilateral and no more specific cause is stated.
Choose this code only when the record supports both the infarction and the bilateral vertebral artery involvement. Check documentation if the laterality, vessel, or mechanism is unclear.
Do not use for
Do not use this code for transient ischemic attack, hemorrhagic stroke, or vertebral artery disease without cerebral infarction. Also avoid it if the chart specifies a different artery or a more specific occlusion or stenosis.
Coding tip
Verify the stroke type and laterality in the provider note before assigning I63.213.