Occlusion and stenosis of right posterior cerebral artery

This diagnosis code signifies a narrowing or complete blockage of the right posterior cerebral artery, a major blood vessel supplying the occipital lobe and parts of the temporal lobe and brainstem. This condition can lead to reduced blood flow (ischemia) to these brain regions, potentially causing symptoms such as visual disturbances, memory issues, or motor deficits.

Use this code when documentation explicitly states occlusion or stenosis affecting the right posterior cerebral artery. This is typically supported by imaging studies such as MRI, MRA, CT angiography, or cerebral angiography, along with clinical findings consistent with posterior circulation ischemia.

• Differentiate between occlusion (complete blockage) and stenosis (narrowing) if specified in the documentation.
• Ensure the laterality (right) is clearly documented; do not assume.
• Consider sequencing this code with codes for any resulting cerebral infarction (e.g., I63.x) if applicable and documented.