Occlusion and stenosis of right middle cerebral artery

This code signifies a narrowing or complete blockage of the right middle cerebral artery, a major blood vessel supplying blood to a large part of the brain. This condition restricts blood flow, potentially leading to ischemic stroke or transient ischemic attack (TIA) in the affected brain region.

Apply this code when documentation explicitly states occlusion or stenosis of the right middle cerebral artery. This is commonly diagnosed via imaging studies such as MRA, CTA, or cerebral angiography, often in patients presenting with acute neurological deficits consistent with a right middle cerebral artery territory event.

• Ensure laterality (right) and the specific vessel (middle cerebral artery) are clearly documented.
• Distinguish between occlusion (complete blockage) and stenosis (narrowing); this code covers both.
• Do not confuse with other cerebral arteries; verify the specific vessel involved.