ICD-10 Code I63.231 – Cerebral infarction due to unspecified occlusion or stenosis of right carotid arteries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.231 – Cerebral infarction due to unspecified occlusion or stenosis of right carotid arteries
What it is
This code identifies an ischemic stroke caused by reduced blood flow from an unspecified blockage or narrowing in the right carotid arteries. Use it when the infarction is documented as involving the right carotid circulation.
Clinical signs
Findings usually reflect acute cerebral ischemia, such as sudden weakness, speech difficulty, facial droop, or vision changes. Clinical features vary; refer to documentation for the affected brain territory and vascular source.
When to use this code
Use I63.231 when the record clearly states cerebral infarction and links it to unspecified occlusion or stenosis of the right carotid arteries. This is appropriate when laterality is documented and the cause is not further specified. If the provider describes a different artery or a hemorrhagic event, choose another code.
Do not use for
Do not use this code for transient ischemic attack, carotid stenosis without infarction, or infarction tied to another vessel. Check documentation if the side, vessel, or stroke type is unclear.
Coding tip
Confirm both the infarction and the right carotid laterality in the note before assigning this code.