ICD-10 Code I63.422 – Cerebral infarction due to embolism of left anterior cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.422 – Cerebral infarction due to embolism of left anterior cerebral artery
What it is
This code identifies an ischemic stroke caused by an embolus blocking the left anterior cerebral artery. It means brain tissue in that artery’s territory has been injured by reduced blood flow.
Clinical signs
Findings usually reflect left frontal or medial cerebral hemisphere involvement, such as weakness or sensory loss affecting the opposite leg more than the arm. Clinical features vary; refer to documentation.
When to use this code
Use I63.422 when the provider documents a cerebral infarction specifically due to embolism of the left anterior cerebral artery. The record should support both the infarction and the embolic mechanism. Do not assign it for transient ischemic attack, hemorrhage, or an unspecified stroke location.
Do not use for
Do not use this code if the infarct is described as thrombotic, due to another artery, or simply as “stroke” without left ACA involvement. Check documentation.
Coding tip
Verify laterality and vascular territory in the imaging report or provider note before coding.