ICD-10 Code I63.443 – Cerebral infarction due to embolism of bilateral cerebellar arteries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.443 – Cerebral infarction due to embolism of bilateral cerebellar arteries
What it is
This code identifies an ischemic stroke in both cerebellar arteries caused by an embolus. It means blood flow to the cerebellum was blocked, leading to infarction in the bilateral cerebellar arterial territory.
Clinical signs
Clinical features vary; refer to documentation. Typical cerebellar stroke findings may include sudden dizziness, gait ataxia, limb incoordination, nausea, vomiting, or nystagmus, but the record should support bilateral cerebellar artery involvement.
When to use this code
Use this code when the provider documents cerebral infarction due to embolism affecting both cerebellar arteries. It is appropriate when imaging, neurology notes, or discharge summaries confirm an embolic ischemic infarct in the bilateral cerebellar distribution. If the source artery or mechanism is not stated, check documentation before coding.
Do not use for
Do not use this code for hemorrhagic stroke, transient ischemic attack, or nonspecific posterior circulation symptoms without confirmed infarction. Do not assign it if embolic bilateral cerebellar involvement is not documented.
Coding tip
Confirm both the embolic cause and the bilateral cerebellar artery location in the provider record before assigning I63.443.