ICD-10 Code I63.349 – Cerebral infarction due to thrombosis of unspecified cerebellar artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.349 – Cerebral infarction due to thrombosis of unspecified cerebellar artery
What it is
I63.349 identifies an ischemic stroke caused by a blood clot blocking a cerebellar artery, but the exact cerebellar artery is not specified. Use it when the record clearly states thrombosis with cerebellar infarction and no more precise vessel detail.
Clinical signs
Clinical features often reflect cerebellar stroke, such as sudden dizziness, imbalance, gait ataxia, nausea, vomiting, or coordination problems. Clinical features vary; refer to documentation, and confirm the infarct is documented as due to thrombosis.
When to use this code
Use this code when the provider documents an acute or recent cerebral infarction in the cerebellum caused by thrombosis, and the affected cerebellar artery is not named. It is appropriate when imaging or the note supports ischemic infarction rather than hemorrhage. If the artery is identified, choose the more specific code instead.
Do not use for
Do not use this code for cerebellar infarction due to embolism, stenosis, occlusion, or hemorrhage. Check documentation if the cause, laterality, or vessel is unclear.
Coding tip
Look for the exact mechanism and vessel in the assessment, because a more specific I63 code may apply when the artery is named.