Question: Which ICD-10-CM choices do I have for carotid artery stenosis? Nebraska Subscriber Answer: If your cardiologist provides adequate documentation, you will select the appropriate carotid artery stenosis code from the following choices based upon whether the stenosis is in the right, left, unspecified, bilateral carotid arteries: Don’t miss: If your cardiologist doesn’t specify the side of the patient’s carotid stenosis, you should report I65.29 (Occlusion and stenosis of unspecified carotid artery).