ICD-10 Code I63.511 – Cerebral infarction due to unspecified occlusion or stenosis of right middle cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.511 – Cerebral infarction due to unspecified occlusion or stenosis of right middle cerebral artery
What it is
This code identifies an ischemic stroke in the right middle cerebral artery territory caused by an unspecified occlusion or narrowing. It indicates brain tissue injury from reduced blood flow, with the exact cause not further specified.
Clinical signs
Typical findings include sudden neurologic deficits such as facial droop, arm weakness, speech disturbance, or sensory loss on the left side. Clinical features vary; refer to documentation and imaging confirming right MCA infarction.
When to use this code
Use this code when the record documents cerebral infarction in the right middle cerebral artery distribution and the occlusion or stenosis is not further specified. It also fits when imaging or provider assessment confirms an ischemic stroke in that artery. Do not infer laterality or vessel details without documentation.
Do not use for
Do not use it for hemorrhagic stroke, transient ischemic attack, or infarction in another cerebral artery. If the cause is documented as embolism, thrombosis, or a different specified vessel lesion, choose the more specific code.
Coding tip
Verify both laterality and vessel name in the provider note or imaging report before assigning I63.511.