Occlusion and stenosis of right anterior cerebral artery

This code signifies a narrowing or complete blockage of the right anterior cerebral artery, a major blood vessel supplying the frontal lobes of the brain. This condition can lead to reduced blood flow (ischemia) to the brain tissue, potentially causing neurological deficits.

Use this code when diagnostic imaging, such as MRI, CT angiography, or cerebral angiography, confirms an occlusion or stenosis specifically affecting the right anterior cerebral artery. Documentation should clearly specify the laterality and the affected vessel.

• Ensure the documentation explicitly states "right" anterior cerebral artery; do not assume laterality.
• Distinguish between occlusion (complete blockage) and stenosis (narrowing); this code covers both.
• Code any associated cerebral infarction (stroke) separately, as this code describes the underlying vascular pathology.