ICD-10 Code I63.30 – Cerebral infarction due to thrombosis of unspecified cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.30 – Cerebral infarction due to thrombosis of unspecified cerebral artery
What it is
This code identifies an ischemic stroke caused by a blood clot in a cerebral artery, when the specific artery is not documented. Use it when the record states thrombosis of an unspecified cerebral artery.
Clinical signs
Typical findings include sudden focal neurologic deficits such as weakness, speech difficulty, facial droop, or vision loss. Clinical features vary; refer to documentation and imaging confirmation when available.
When to use this code
Use this code when the clinician documents cerebral infarction due to thrombosis, but does not name the affected cerebral artery. It also fits discharge summaries, imaging reports, or consult notes that confirm ischemic stroke with unspecified arterial thrombosis. You should code the documented acuity and laterality only if stated.
Do not use for
Do not use this code for embolic stroke, hemorrhagic stroke, or cerebral infarction from a clearly named artery. Check documentation if the record describes occlusion without thrombosis or gives a more specific infarction code.
Coding tip
If the artery is named anywhere in the chart, code the more specific cerebral infarction option instead of this unspecified code.