ICD-10 Code I63.43 – Cerebral infarction due to embolism of posterior cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.43 – Cerebral infarction due to embolism of posterior cerebral artery
What it is
This code identifies an ischemic stroke caused by an embolus blocking the posterior cerebral artery. It means part of the brain supplied by that artery has lost blood flow and sustained infarction.
Clinical signs
Clinical features vary; refer to documentation. Common findings include visual field loss, visual disturbance, and other focal neurologic deficits consistent with posterior circulation stroke.
When to use this code
Use I63.43 when the provider documents cerebral infarction due to embolism of the posterior cerebral artery. It applies when the stroke is confirmed or clearly diagnosed and the artery source is specified. If the record names only “stroke” or “CVA,” check documentation for the exact vessel and cause.
Do not use for
Do not use this code for hemorrhagic stroke, transient ischemic attack, or infarction from a non-embolic cause. If the posterior cerebral artery is not specified, check documentation.
Coding tip
Code the documented artery and mechanism together; if either is unclear, query the provider before assigning I63.43.