O30.00 Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacsNon-billable header with 4 child codes.
O30.001 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 trimesterO30.009 Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimesterO30 Multiple gestationO30.0 Twin pregnancyO30.00 Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs (this code)O30.001 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 trimesterO30.009 Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimesterO30.01 Twin pregnancy, monochorionic/monoamniotic