Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction (I66)
Browse all the diagnosis codes used for occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction (I66). For easy navigation, the diagnosis codes are sorted in alphabetical order and grouped by sections. Each section is clearly marked with its description, and the corresponding three-digit code range. This format makes it simple to browse diagnosis codes in this chapter or section and find what you're looking for. We've also added green checkmark icons to label billable codes, and red warning icons for non-billable ones. This makes it easy to identify which codes can be billed.
Diseases of the circulatory system (I00–I99)
Cerebrovascular diseases (I60-I69)
I66 Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
I66.0 Occlusion and stenosis of middle cerebral artery
- 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
I66.1 Occlusion and stenosis of anterior 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
I66.2 Occlusion and stenosis of posterior 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
Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction (I66)
Instructional Notations
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- embolism of cerebral artery
- narrowing of cerebral artery
- obstruction (complete) (partial) of cerebral artery
- thrombosis of cerebral artery
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
