Occlusion and stenosis of bi posterior cerebral arteries

This code signifies a narrowing or complete blockage affecting both the left and right posterior cerebral arteries. This condition can restrict blood flow to the occipital lobes, thalami, and parts of the temporal lobes, potentially leading to visual disturbances, neurological deficits, or stroke.

Assign this code when documentation explicitly states occlusion or stenosis of both posterior cerebral arteries. This is typically supported by imaging studies such as MRA, CTA, or conventional angiography, along with neurological examination findings consistent with posterior circulation compromise.

• Ensure documentation specifies bilateral involvement; unilateral involvement requires a different code.
• Do not confuse with anterior or middle cerebral artery occlusions; these are distinct anatomical locations.
• Sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it is a co-morbidity impacting patient care.