Occlusion and stenosis of cerebellar arteries

This code signifies a narrowing or blockage within the arteries supplying blood to the cerebellum. This can lead to reduced blood flow (ischemia) to this vital part of the brain, potentially causing neurological deficits related to coordination, balance, and motor control.

Use this code when documentation explicitly states occlusion or stenosis affecting the cerebellar arteries. This diagnosis is often supported by imaging studies such as MRA, CTA, or conventional angiography, confirming the location and nature of the vascular compromise.

• Ensure documentation specifies "cerebellar arteries" to differentiate from other intracranial arterial occlusions.
• Do not confuse with I66.0-I66.2, which specify occlusion/stenosis of middle, anterior, or posterior cerebral arteries, respectively.
• Code any associated cerebral infarction (I63.-) as a primary diagnosis if it resulted from the cerebellar artery occlusion/stenosis.