I66
Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
Non-billableCategory
Chapter: 9. Diseases of the circulatory system
Section: I60-I69 - Cerebrovascular diseases
Coding Guidelines
Includes
- embolism of cerebral artery
- narrowing of cerebral artery
- obstruction (complete) (partial) of cerebral artery
- thrombosis of cerebral artery
Excludes1 (Mutually Exclusive)
These codes should never be used together with I66
- I63.3-I635 - Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5)
Specific Codes (6)
I66.0Category
Occlusion and stenosis of middle cerebral artery
I66.1Category
Occlusion and stenosis of anterior cerebral artery
I66.2Category
Occlusion and stenosis of posterior cerebral artery
I66.3Billable
Occlusion and stenosis of cerebellar arteries
I66.8Billable
Occlusion and stenosis of other cerebral arteries
I66.9Billable
Occlusion and stenosis of unspecified cerebral artery
