I66.29
I66.29 — Occlusion and stenosis of unspecified posterior cerebral artery
Billable / specific codeICD-10-CM
I66.29 is a billable, specific ICD-10-CM code for occlusion and stenosis of unspecified posterior cerebral artery. It is valid for submission on a claim.
Risk adjustment
I66.29 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
I66.29 is named in 11 Medicare coverage policies — 11 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
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Related codes at this level
Codes that share I66.2. If I66.29 is not quite right, the correct code is usually one of these.
Questions about I66.29
- Is I66.29 a billable ICD-10-CM code?
- Yes. I66.29 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I66.29 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Cerebrovascular diseases (I60-I69).