ICD-10 Code I63.42 – Cerebral infarction due to embolism of anterior cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.42 – Cerebral infarction due to embolism of anterior cerebral artery
What it is
This code identifies an ischemic stroke caused by an embolus that blocks the anterior cerebral artery. Use it when documentation states cerebral infarction specifically due to embolism in that artery.
Clinical signs
Findings may include sudden focal neurologic deficits consistent with anterior cerebral artery territory ischemia, 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 I63.42 when the record documents cerebral infarction from an embolic event involving the anterior cerebral artery. It is appropriate when the provider names the artery and the embolic mechanism. If the documentation only says stroke or infarction without location or cause, check documentation.
Do not use for
Do not use this code for hemorrhagic stroke, transient ischemic attack, or cerebral infarction from thrombosis or unspecified occlusion. Also avoid it when the artery or embolic source is not documented.
Coding tip
Confirm both the infarction type and the embolic artery in the provider note before assigning I63.42.