ICD-10 Code I63.139 – Cerebral infarction due to embolism of unspecified carotid artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I63.139 – Cerebral infarction due to embolism of unspecified carotid artery
What it is
This code identifies an ischemic stroke caused by an embolus blocking an unspecified carotid artery and leading to brain infarction. Use it when documentation names carotid embolism but does not specify the side.
Clinical signs
Typical findings include sudden focal neurologic deficits such as unilateral weakness, facial droop, speech disturbance, or vision loss. Clinical features vary; refer to documentation and imaging when available.
When to use this code
Use I63.139 when the provider documents cerebral infarction due to embolism of a carotid artery and the affected carotid side is not stated. It also fits discharge summaries, imaging reports, or consult notes that support an acute ischemic stroke from carotid embolism. If the record later identifies the side, code the more specific option.
Do not use for
Do not use this code for hemorrhagic stroke, transient ischemic attack, or infarction from non-embolic causes. Check documentation if the carotid side is specified or if the stroke mechanism is uncertain.
Coding tip
Confirm both the infarction and embolic carotid source are documented before assigning this code.