O43.029 ICD-10-CM Code: Fetus-to-fetus placental transfusion syndrome, unspecified trimester

O43.029 is the ICD-10-CM diagnosis code for fetus-to-fetus placental transfusion syndrome, unspecified trimester. A condition where blood abnormally transfers between twins through the placenta, causing one twin to receive too much blood and the other too little; the specific trimester of pregnancy is not documented. O43.029 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).

O43.029 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 is used when fetus-to-fetus transfusion syndrome is diagnosed but the trimester is unknown or not specified in the medical record.