ICD-10 Code I63.33 – Cerebral infarction due to thrombosis of posterior cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.33 – Cerebral infarction due to thrombosis of posterior cerebral artery
What it is
This code identifies an ischemic stroke caused by a blood clot blocking the posterior cerebral artery. It describes infarction in the artery’s territory, typically affecting the occipital lobe and related deep brain structures.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include sudden visual field loss, visual disturbance, confusion, or memory problems, depending on the infarct location and extent.
When to use this code
Use I63.33 when the provider documents cerebral infarction due to thrombosis of the posterior cerebral artery. Code it for confirmed ischemic stroke in that vascular territory, not for transient symptoms alone. If the record does not clearly identify thrombosis, check documentation.
Do not use for
Do not use this code for embolic stroke, hemorrhagic stroke, or transient ischemic attack. If the artery involved or the mechanism is unclear, do not guess; check documentation.
Coding tip
Assign the code only when the posterior cerebral artery thrombosis is explicitly documented as the cause of the infarction.