ICD-10 Code I63.413 – Cerebral infarction due to embolism of bilateral middle cerebral arteries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.413 – Cerebral infarction due to embolism of bilateral middle cerebral arteries
What it is
This code identifies an ischemic stroke caused by an embolus blocking both middle cerebral arteries. Use it when documentation specifies cerebral infarction from embolism affecting the bilateral MCA territory.
Clinical signs
Findings may include sudden focal neurologic deficits such as weakness, sensory loss, speech disturbance, or altered awareness. Clinical features vary; refer to documentation and imaging when available.
When to use this code
Use this code when the provider documents cerebral infarction due to embolism involving both middle cerebral arteries. It is appropriate for confirmed bilateral MCA infarcts on imaging or clearly stated in the assessment.
If the record only says ischemic stroke, embolic stroke, or MCA infarct without bilateral involvement, check documentation before assigning this code. Code the documented vessel and cause exactly as stated.
Do not use for
Do not use this code for hemorrhagic stroke, transient ischemic attack, or infarction from thrombosis without embolism. Check documentation if laterality or arterial territory is not clearly specified.
Coding tip
Match the code to both the embolic cause and bilateral middle cerebral artery involvement; if either element is missing, query the provider.