O30.9 Multiple gestation, unspecifiedNon-billable header with 4 child codes.
O30.90 Multiple gestation, unspecified, unspecified trimesterO30.91 Multiple gestation, unspecified, first trimesterO30.92 Multiple gestation, unspecified, second trimesterO30.93 Multiple gestation, unspecified, third trimesterO30.89 Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacsO30.891 Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, first trimesterO30.892 Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, second trimesterO30.893 Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, third trimesterO30.899 Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, unspecified trimesterO30.9 Multiple gestation, unspecified (this code)O30.90 Multiple gestation, unspecified, unspecified trimesterO30.91 Multiple gestation, unspecified, first trimesterO30.92 Multiple gestation, unspecified, second trimesterO30.93 Multiple gestation, unspecified, third trimester