ICD-10 Code I63.9 – Cerebral infarction, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.9 – Cerebral infarction, unspecified
What it is
I63.9 identifies an ischemic stroke, or cerebral infarction, when the documentation does not specify the artery, territory, or cause. Use it when the record confirms brain infarction but gives no further detail.
Clinical signs
Clinical features vary; refer to documentation. Common findings include sudden focal neurologic deficits such as weakness, speech difficulty, facial droop, vision loss, or altered coordination, consistent with acute cerebral ischemia.
When to use this code
Use I63.9 when the provider documents cerebral infarction, ischemic stroke, or CVA without specifying the vessel or infarct type. It also fits cases where imaging or consultation confirms infarction, but the chart does not name a more specific subtype. If laterality, artery, or mechanism is documented, choose the more specific code instead.
Do not use for
Do not use this code for hemorrhagic stroke, transient ischemic attack, or cerebral infarction with a documented specific artery or mechanism. Check documentation if the event is only suspected or ruled out.
Coding tip
Code I63.9 only when specificity is truly absent; review imaging, discharge summary, and neurology notes for a more precise stroke code.