O30.133
BillableTriplet pregnancy, trichorionic/triamniotic, third trimester
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is O30.133 an HCC code?
No. O30.133 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
O30.133 is the ICD-10-CM diagnosis code for triplet pregnancy, trichorionic/triamniotic, third trimester. A pregnancy with three fetuses, each with its own placenta and amniotic sac, during the third trimester. This is the lowest-risk type of triplet pregnancy configuration. O30.133 sits in the ICD-10-CM chapter for pregnancy, childbirth and the puerperium (o00-o9a), within the section covering maternal care related to the fetus and amniotic cavity and possible delivery problems (o30-o48).
O30.133 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Confirm trichorionic/triamniotic status through current ultrasound or imaging documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for O30.133 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm trichorionic/triamniotic status through current ultrasound or imaging documentation
- •Verify third trimester dating (week 21 onward) is documented in the current clinical note