I15.9 — Secondary hypertension, unspecified
I15.9 is a billable, specific ICD-10-CM code for secondary hypertension, unspecified. It is valid for submission on a claim.
Risk adjustment
I15.9 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
I15.9 is named in 4 Medicare coverage policies — 4 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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How I15.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I15.9.
- Hypertension, hypertensive›secondary NEC
Related codes at this level
Codes that share I15. If I15.9 is not quite right, the correct code is usually one of these.
Questions about I15.9
- Is I15.9 a billable ICD-10-CM code?
- Yes. I15.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I15.9 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Hypertensive diseases (I10-I1A).