Occlusion and stenosis of bi anterior cerebral arteries

This code signifies a narrowing or complete blockage affecting both the left and right anterior cerebral arteries. This condition restricts blood flow to the frontal lobes of the brain, potentially leading to neurological deficits related to motor function, executive function, and personality.

Use this code when diagnostic imaging, such as MRI, MRA, CT angiography, or cerebral angiography, confirms occlusion or significant stenosis in both anterior cerebral arteries. Documentation should clearly specify the bilateral involvement of these particular vessels.

• Ensure documentation explicitly states "bilateral" involvement of the anterior cerebral arteries.
• Distinguish from unilateral involvement (I66.11 for right, I66.12 for left) or other cerebral arteries.
• Code any associated cerebral infarction (stroke) separately, typically as a sequela or acute event, depending on the timing and clinical presentation.