ICD-10 Code I63.323 – Cerebral infarction due to thrombosis of bilateral anterior cerebral arteries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.323 – Cerebral infarction due to thrombosis of bilateral anterior cerebral arteries
What it is
This code identifies an ischemic stroke caused by a blood clot blocking both anterior cerebral arteries. It means brain tissue in the ACA territory has lost blood flow and sustained infarction.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include weakness or sensory loss affecting the legs more than the arms, abulia, and impaired gait or urinary control when the medial frontal lobes are involved.
When to use this code
Use I63.323 when the provider documents cerebral infarction from thrombosis of both anterior cerebral arteries. This applies to confirmed ischemic stroke involving the bilateral ACA territory, whether identified by imaging, operative findings, or clear clinician documentation.
If the record only states “stroke,” “CVA,” or “cerebral infarction” without the arterial location or cause, check documentation before assigning this code. Code the documented laterality and mechanism as specifically as possible.
Do not use for
Do not use this code for hemorrhagic stroke, transient ischemic attack, or cerebral infarction from embolism or unspecified occlusion. Check documentation if the arterial territory or thrombotic cause is not clearly stated.
Coding tip
Confirm both the infarction mechanism and the bilateral ACA location in the chart before coding.