I66 Occls and stenosis of cereb art, not rslt in cerebral infrc
ICD-10-CM category I66 sits in Chapter 9 (Diseases of the circulatory system, I00-I99). It contains 15 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Subcategories
I66.0 Occlusion and stenosis of middle cerebral arteryI66.1 Occlusion and stenosis of anterior cerebral arteryI66.2 Occlusion and stenosis of posterior cerebral artery
Billable codes in I66
| Code | Description |
|---|---|
I66.01 | Occlusion and stenosis of right middle cerebral artery |
I66.02 | Occlusion and stenosis of left middle cerebral artery |
I66.03 | Occlusion and stenosis of bilateral middle cerebral arteries |
I66.09 | Occlusion and stenosis of unspecified middle cerebral artery |
I66.11 | Occlusion and stenosis of right anterior cerebral artery |
I66.12 | Occlusion and stenosis of left anterior cerebral artery |
I66.13 | Occlusion and stenosis of bilateral anterior cerebral arteries |
I66.19 | Occlusion and stenosis of unspecified anterior cerebral artery |
I66.21 | Occlusion and stenosis of right posterior cerebral artery |
I66.22 | Occlusion and stenosis of left posterior cerebral artery |
I66.23 | Occlusion and stenosis of bilateral posterior cerebral arteries |
I66.29 | Occlusion and stenosis of unspecified posterior cerebral artery |
I66.3 | Occlusion and stenosis of cerebellar arteries |
I66.8 | Occlusion and stenosis of other cerebral arteries |
I66.9 | Occlusion and stenosis of unspecified cerebral artery |
Search within ICD-10-CM for I66 and related codes
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