O09.91 — Supervision of high risk pregnancy, unspecified, first trimester
O09.91 is a billable, specific ICD-10-CM code for supervision of high risk pregnancy, unspecified, first trimester. It is valid for submission on a claim.
Risk adjustment
O09.91 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
O09.91 is named in 6 Medicare coverage policies — 6 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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Code history
O09.91 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share O09.9. If O09.91 is not quite right, the correct code is usually one of these.
Questions about O09.91
- Is O09.91 a billable ICD-10-CM code?
- Yes. O09.91 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does O09.91 sit in the tabular list?
- Pregnancy, childbirth and the puerperium (O00-O9A), in the block Supervision of high risk pregnancy (O09).