O30 Multiple gestationNon-billable header with 5 child codes.
O30.0 Twin pregnancyO30.1 Triplet pregnancyO30.2 Quadruplet pregnancyO30.8 Other specified multiple gestationO30.9 Multiple gestation, unspecifiedO30 Multiple gestation (this code)O30.0 Twin pregnancyO30.00 Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacsO30.001 Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, first trimesterO30.002 Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, second trimesterO30.003 Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, third trimester