ICD-10 Code I63.39 – Cerebral infarction due to thrombosis of other cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.39 – Cerebral infarction due to thrombosis of other cerebral artery
What it is
This code identifies an ischemic stroke caused by a blood clot blocking a specified cerebral artery other than the major named vessels. Use it when documentation states cerebral infarction from thrombosis of another cerebral artery.
Clinical signs
Typical findings include sudden focal neurologic deficits such as weakness, speech difficulty, facial droop, or vision changes. Clinical features vary; refer to documentation and imaging results supporting cerebral infarction.
When to use this code
Use I63.39 when the provider documents cerebral infarction due to thrombosis in a cerebral artery not otherwise specified by a more exact subcategory. It fits acute ischemic stroke records with arterial thrombosis as the cause. Confirm the artery and mechanism are documented.
Do not use for
Do not use this code for hemorrhagic stroke, cerebral infarction from embolism, or infarction of a clearly named artery with a more specific code. Check documentation if the cause or vessel is unclear.
Coding tip
Code the most specific documented stroke mechanism and artery; if the record does not identify thrombosis or the vessel, query for clarification.