ICD-10 Code I63.412 – Cerebral infarction due to embolism of left middle cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.412 – Cerebral infarction due to embolism of left middle cerebral artery
What it is
This code identifies an ischemic stroke caused by an embolus blocking the left middle cerebral artery. Use it when documentation specifies cerebral infarction due to embolism in that vessel.
Clinical signs
Clinical features vary; refer to documentation. Typical left MCA stroke findings may include right-sided weakness or numbness, speech or language impairment, and facial droop.
When to use this code
Use I63.412 when the provider documents cerebral infarction from embolic occlusion of the left middle cerebral artery. The record should support an acute ischemic stroke, not a transient ischemic attack or old infarct. If laterality or vessel source is unclear, check documentation before coding.
Do not use for
Do not use this code for hemorrhagic stroke, TIA, or infarction without documented embolic cause. If the chart does not confirm the left middle cerebral artery, check documentation.
Coding tip
Match the stroke type, cause, and laterality exactly as documented before assigning I63.412.