ICD-10 Code I63.433 – Cerebral infarction due to embolism of bilateral posterior cerebral arteries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.433 – Cerebral infarction due to embolism of bilateral posterior cerebral arteries
What it is
This code identifies an ischemic stroke caused by an embolus blocking both posterior cerebral arteries, leading to infarction in the brain regions they supply. Use it when documentation clearly states bilateral PCA embolic cerebral infarction.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include visual field loss, confusion, memory problems, or other focal neurologic deficits consistent with posterior circulation stroke.
When to use this code
Use I63.433 when the record confirms cerebral infarction from embolism affecting both posterior cerebral arteries. The diagnosis should come from provider documentation, imaging, or a clear stroke assessment. If laterality, vessel, or cause is not specified, check documentation before assigning this code.
Do not use for
Do not use this code for hemorrhagic stroke, transient ischemic attack, or infarction from thrombosis or unspecified occlusion. If the embolic source or bilateral PCA involvement is not documented, check documentation.
Coding tip
Confirm both the mechanism, embolism, and the exact vessel territory, bilateral posterior cerebral arteries, before coding.