O30.221
BillableQuadruplet pregnancy with two or more monoamniotic fetuses, first trimester
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is O30.221 an HCC code?
No. O30.221 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
O30.221 is the ICD-10-CM diagnosis code for quadruplet pregnancy with two or more monoamniotic fetuses, first trimester. A pregnancy with four babies where at least two share the same amniotic sac during the first three months of pregnancy. O30.221 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).
O30.221 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.
This code requires documentation of the specific chorionicity and amnionicity status of the quadruplet pregnancy.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for O30.221 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code requires documentation of the specific chorionicity and amnionicity status of the quadruplet pregnancy.
- •The trimester must be clearly documented in the medical record to select the correct fifth character.