Carotid Stenosis ICD-10-CM Codes

Learn more about the ICD-10-CM codes for carotid stenosis, its clinical descriptions, synonyms, and more in this this comprehensive guide.

By Patricia Buenaventura on Aug 8, 2025.

Fact Checked by Karina Jimenea.

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What ICD-10 codes are used for carotid stenosis?

Carotid stenosis refers to the narrowing of the carotid arteries, which can lead to reduced blood flow to the brain and an increased risk of stroke. Proper ICD-10-CM codes are essential for accurate billing and documentation.

Below are 4 commonly used carotid stenosis ICD Codes that are under I65.2 or Occlusion and stenosis of carotid artery:

I65.21: Occlusion and stenosis of right carotid artery

This code is used when a nontraumatic dissection or tear in the carotid artery causes stenosis.

I65.22: Occlusion and stenosis of left carotid artery

This code is used when the carotid artery narrows without a traumatic cause.

I65.23: Occlusion and stenosis of bilateral carotid arteries

Used when both carotid arteries are narrowed without a traumatic cause.

I65.29: Occlusion and stenosis of unspecified carotid artery

This code covers cases of nontraumatic carotid stenosis not falling into the previously mentioned categories.

Are carotid stenosis ICD codes are billable?

I65.21 - Yes, billable: Reimbursement is available for nontraumatic carotid artery dissection leading to stenosis when accurately coded.

I65.22 - Yes, billable: Cases of nontraumatic carotid artery stenosis are eligible for reimbursement upon accurate coding.

I65.23 - Yes, billable: Reimbursement is applicable for nontraumatic bilateral carotid artery stenosis when documented appropriately.

I65.29 - Yes, billable: Other specified nontraumatic carotid artery stenosis can be billed when supported by medical records.

Clinical information

Carotid stenosis refers to the narrowing of the carotid arteries, which supply blood to the brain.
The condition is often caused by atherosclerosis which is plaque buildup inside the arteries.
Carotid stenosis can reduce blood flow to the brain, increasing the risk of stroke or transient ischemic attacks (TIAs).
Symptoms may not be noticeable until a significant blockage occurs, but signs can include transient weakness, visual disturbances, and speech difficulties.
Diagnosis is typically made through imaging tests such as carotid ultrasound, CT angiography, or magnetic resonance angiography (MRA).
Treatment options include lifestyle changes, medications to manage risk factors, and, in severe cases, carotid endarterectomy or stenting to remove or bypass the blockage.
Management of carotid stenosis aims to prevent stroke and improve blood flow to the brain.
Regular follow-up and adherence to medical recommendations are essential for optimal outcomes.

Synonyms include

Carotid artery stenosis
Carotid narrowing
Carotid artery obstruction
Carotid artery occlusion

Commonly asked questions

No, carotid stenosis may not always cause symptoms, but it can increase the risk of stroke or transient ischemic attacks (TIAs).

Maintaining a healthy lifestyle, controlling high blood pressure, and managing cholesterol levels can help reduce the risk of carotid stenosis.

Treatment options include lifestyle changes, medications, and, in severe cases, surgical procedures to restore proper blood flow in the carotid arteries.

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