ICD-10 Code I63.4 – Cerebral infarction due to embolism of cerebral arteries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.4 – Cerebral infarction due to embolism of cerebral arteries
What it is
I63.4 identifies an ischemic stroke caused by an embolus blocking a cerebral artery. Use it when documentation states cerebral infarction due to embolism of cerebral arteries.
Clinical signs
Typical findings include sudden focal neurologic deficits such as weakness, speech disturbance, facial droop, or visual loss. Imaging usually supports an acute cerebral infarction; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents a cerebral infarction from embolic occlusion of a cerebral artery. It fits acute stroke encounters and related follow-up when the diagnosis is confirmed. If the record names a different mechanism, such as thrombosis or unspecified occlusion, do not assume I63.4.
Do not use for
Do not use I63.4 for hemorrhagic stroke, transient ischemic attack, or cerebral infarction due to thrombosis or unspecified occlusion. Check documentation if the cause of the infarct is not clearly stated.
Coding tip
Code the embolic stroke only when the provider explicitly links the infarction to embolism of cerebral arteries.