ICD-10-CM · Chapter 9 · I00–I99
I66.1
Occlusion and stenosis of anterior cerebral artery
Diseases of the circulatory system
Heads up:this is a parent code. It's typically not directly billable — you need to drill down to a more specific child code (one with additional digits) to use on a claim.
Quick facts
- Code
- I66.1
- Type
- Category / header (non-billable)
- ICD-10-CM chapter
- Chapter 9 — Diseases of the circulatory system
- Category
- I66 — Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
- Specificity
- 4 characters
How coders use this code
ICD-10-CM I66.1 is a category (header) for occlusion and stenosis of anterior cerebral artery. It is generally not reported directly on a claim — coders drill down to a more specific child code (one with additional characters) that matches the documentation. Use the related codes below to find the billable code that fits, and verify against the annual NCHS/CMS guidelines.
Related codes in I66
- I66Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
- I66.0Occlusion and stenosis of middle cerebral artery
- I66.01Occlusion and stenosis of right middle cerebral artery
- I66.02Occlusion and stenosis of left middle cerebral artery
- I66.03Occlusion and stenosis of bilateral middle cerebral arteries
- I66.09Occlusion and stenosis of unspecified middle cerebral artery
- I66.11Occlusion and stenosis of right anterior cerebral artery
- I66.12Occlusion and stenosis of left anterior cerebral artery
- I66.13Occlusion and stenosis of bilateral anterior cerebral arteries
- I66.19Occlusion and stenosis of unspecified anterior cerebral artery
- I66.2Occlusion and stenosis of posterior cerebral artery
- I66.21Occlusion and stenosis of right posterior cerebral artery
- I66.22Occlusion and stenosis of left posterior cerebral artery
- I66.23Occlusion and stenosis of bilateral posterior cerebral arteries
- I66.29Occlusion and stenosis of unspecified posterior cerebral artery
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