ICD-10 Code I63.331 – Cerebral infarction due to thrombosis of right posterior cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.331 – Cerebral infarction due to thrombosis of right posterior cerebral artery
What it is
This code identifies an ischemic stroke caused by a blood clot blocking the right posterior cerebral artery. It indicates infarction in the artery’s supplied brain territory.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include visual field loss, visual neglect, or other focal neurologic deficits consistent with posterior cerebral artery territory involvement.
When to use this code
Use this code when the provider documents cerebral infarction due to thrombosis of the right posterior cerebral artery. It fits confirmed ischemic stroke cases with a documented thrombotic cause and right-sided PCA involvement. Check documentation if laterality or mechanism is unclear.
Do not use for
Do not use this code for embolic stroke, hemorrhagic stroke, or infarction without documented thrombosis of the right posterior cerebral artery. If the record only says “stroke” or “CVA,” check documentation.
Coding tip
Verify both the vessel and the cause; laterality and thrombosis must be documented to assign I63.331 correctly.