I66Non-billable (header)
Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
Occlusion and stenosis of cerebral arteries, not resulting i…
Related Codes· Cerebrovascular diseases (I60-I69)
Sub-codes of I66(6)
I66 is a non-billable header. Select a sub-code to bill.
I66.0Occlusion and stenosis of middle cerebral arteryHeaderI66.1Occlusion and stenosis of anterior cerebral arteryHeaderI66.2Occlusion and stenosis of posterior cerebral arteryHeaderI66.3Occlusion and stenosis of cerebellar arteries✓ BillableI66.8Occlusion and stenosis of other cerebral arteries✓ BillableI66.9Occlusion and stenosis of unspecified cerebral artery✓ Billable
✓ Includes
- •embolism of cerebral artery
- •narrowing of cerebral artery
- •obstruction (complete) (partial) of cerebral artery
- •thrombosis of cerebral artery
✗ Excludes 1(Not coded here)
- •Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5)
Code Hierarchy
┌9Diseases of the circulatory system (I00-I99)├I60-I69Cerebrovascular diseases (I60-I69)├I66Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
└I66Occlusion and stenosis of cerebral arteries, not resulting i…
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