Occlusion and stenosis of bilateral carotid arteries

This code signifies a narrowing or complete blockage affecting both the left and right carotid arteries. These arteries are crucial for supplying blood to the brain, and their compromise can lead to significant neurological deficits, including stroke. The condition can be caused by atherosclerosis, fibromuscular dysplasia, or other vascular diseases.

Apply this code when documentation explicitly states occlusion or stenosis impacting both carotid arteries. This diagnosis is typically supported by imaging studies such as carotid ultrasound, CT angiography, or MR angiography, along with clinical findings of cerebral ischemia. Use it for patients presenting with symptoms like transient ischemic attacks (TIAs), stroke, or asymptomatic but significant bilateral carotid artery disease.

• Ensure documentation specifies bilateral involvement; otherwise, use codes for unilateral occlusion/stenosis.
• Distinguish between occlusion (complete blockage) and stenosis (narrowing); this code covers both.
• Sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis when it contributes to the patient's overall condition.