ICD-10 Code I63.532 – Cerebral infarction due to unspecified occlusion or stenosis of left posterior cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.532 – Cerebral infarction due to unspecified occlusion or stenosis of left posterior cerebral artery
What it is
This code identifies an ischemic stroke in the left posterior cerebral artery territory caused by an unspecified blockage or narrowing. Use it when the record documents infarction in that artery but does not specify whether the occlusion or stenosis is embolic, thrombotic, or another cause.
Clinical signs
Findings depend on the brain area affected and may include visual field loss, altered vision, memory problems, or sensory changes. Clinical features vary; refer to documentation and imaging that support infarction in the left posterior cerebral artery distribution.
When to use this code
Use this code when the provider documents cerebral infarction involving the left posterior cerebral artery and the cause is described only as unspecified occlusion or stenosis. It is also appropriate when imaging or the final diagnosis confirms the vascular territory, but the mechanism is not further defined. Check documentation if laterality or vessel detail is unclear.
Do not use for
Do not use this code for transient ischemic attack, hemorrhagic stroke, or infarction in a different arterial territory. Do not assign it if the documentation specifies a different cause, such as embolism or thrombosis, unless the record supports unspecified occlusion or stenosis.
Coding tip
Verify both laterality and vessel name in the final diagnosis before assigning I63.532.