ICD-10 Code I63.531 – Cerebral infarction due to unspecified occlusion or stenosis of right posterior cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.531 – Cerebral infarction due to unspecified occlusion or stenosis of right posterior cerebral artery
What it is
This code identifies an ischemic stroke caused by reduced or blocked blood flow in the right posterior cerebral artery. It is used when the infarction is documented, but the occlusion or stenosis is not further specified.
Clinical signs
Clinical features vary; refer to documentation. Findings may include sudden 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 a cerebral infarction in the right posterior cerebral artery territory and describes the vessel lesion as unspecified occlusion or stenosis. You should also use it when imaging or clinical notes support an ischemic stroke in that distribution without a more specific cause.
Do not assign it for transient ischemic attack, hemorrhagic stroke, or a history of stroke without current infarction. Check documentation if the side, vessel, or mechanism is unclear.
Do not use for
Do not use this code for left-sided posterior cerebral artery infarction, embolic infarction with a more specific code, or noncerebral vascular disease. If the record does not confirm infarction, check documentation.
Coding tip
Verify that the documentation names the right posterior cerebral artery and confirms infarction before coding I63.531.