ICD-10 Code G46.1 – Anterior cerebral artery syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G46.1 – Anterior cerebral artery syndrome
What it is
This code identifies a neurologic syndrome caused by impaired blood flow in the anterior cerebral artery territory. It is used when documentation specifies the vascular syndrome rather than a broader stroke diagnosis.
Clinical signs
Common findings include weakness or sensory loss affecting the leg more than the arm, along with possible speech, behavior, or urinary changes. Clinical features vary; refer to documentation.
When to use this code
Use G46.1 when the provider documents anterior cerebral artery syndrome, anterior cerebral infarction syndrome, or a comparable vascular syndrome in the ACA distribution. Code the condition as documented in the record, especially when the neurologic syndrome is the focus of care. Check documentation if the note only states stroke, infarction, or cerebrovascular accident without the arterial syndrome.
Do not use for
Do not use this code for nonspecific stroke, transient ischemic attack, or hemorrhagic cerebrovascular disease. If the record does not clearly identify an anterior cerebral artery syndrome, check documentation.
Coding tip
Verify that the provider links the neurologic deficits to the anterior cerebral artery territory before assigning G46.1.