ICD-10 Code I63.542 – Cerebral infarction due to unspecified occlusion or stenosis of left cerebellar artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.542 – Cerebral infarction due to unspecified occlusion or stenosis of left cerebellar artery
What it is
This code identifies an ischemic stroke in the left cerebellar artery territory caused by an unspecified blockage or narrowing. Use it when the record documents cerebellar infarction and left-sided arterial involvement, but not the exact mechanism.
Clinical signs
Clinical features vary; refer to documentation. Cerebellar infarction may present with dizziness, imbalance, gait ataxia, nausea, vomiting, or limb incoordination, and imaging typically confirms an acute infarct in the left cerebellar territory.
When to use this code
Use this code when the provider documents cerebral infarction involving the left cerebellar artery and states the occlusion or stenosis is unspecified. It fits confirmed ischemic stroke cases, not transient symptoms alone. If the record names a different vessel or a more specific cause, code that instead.
Do not use for
Do not use this code for hemorrhagic stroke, transient ischemic attack, or nonspecific dizziness without documented infarction. Do not use it when another cerebral artery is specified or when the note identifies a definite occlusion type.
Coding tip
Verify laterality, vessel name, and infarction wording in the provider note before assigning I63.542.