ICD-10 Code I63.031 – Cerebral infarction due to thrombosis of right carotid artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.031 – Cerebral infarction due to thrombosis of right carotid artery
What it is
This code identifies an ischemic stroke caused by a blood clot in the right carotid artery, leading to reduced blood flow and infarction in the brain. Use it when the record specifies thrombosis of the right carotid artery as the cause.
Clinical signs
Typical findings include sudden focal neurologic deficits such as weakness, speech disturbance, facial droop, or vision loss on the affected side. Clinical features vary; refer to documentation and imaging or provider assessment.
When to use this code
Use this code when the provider documents cerebral infarction due to thrombosis of the right carotid artery, or clearly links the stroke to that vessel. It is appropriate for confirmed ischemic infarction, not for transient ischemic attack or nonspecific cerebrovascular symptoms. Check documentation if laterality or mechanism is unclear.
Do not use for
Do not use this code for embolic stroke, hemorrhagic stroke, or infarction due to carotid stenosis without thrombosis. If the chart does not specify the right carotid artery, choose the code that matches the documented vessel or mechanism.
Coding tip
Verify both the infarction and the documented right-sided carotid thrombosis before assigning I63.031.