| ICD-10 Code | Description |
| O30.001 | Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, first trimester |
| O30.002 | Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, second trimester |
| O30.003 | Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, third trimester |
| O30.009 | Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimester |
| O30.011 | Twin pregnancy, monochorionic/monoamniotic, first trimester |
| O30.012 | Twin pregnancy, monochorionic/monoamniotic, second trimester |
| O30.013 | Twin pregnancy, monochorionic/monoamniotic, third trimester |
| O30.019 | Twin pregnancy, monochorionic/monoamniotic, unspecified trimester |
| O30.021 | Conjoined twin pregnancy, first trimester |
| O30.022 | Conjoined twin pregnancy, second trimester |
| O30.023 | Conjoined twin pregnancy, third trimester |
| O30.029 | Conjoined twin pregnancy, unspecified trimester |
| O30.031 | Twin pregnancy, monochorionic/diamniotic, first trimester |
| O30.032 | Twin pregnancy, monochorionic/diamniotic, second trimester |
| O30.033 | Twin pregnancy, monochorionic/diamniotic, third trimester |
| O30.039 | Twin pregnancy, monochorionic/diamniotic, unspecified trimester |
| O30.041 | Twin pregnancy, dichorionic/diamniotic, first trimester |
| O30.042 | Twin pregnancy, dichorionic/diamniotic, second trimester |
| O30.043 | Twin pregnancy, dichorionic/diamniotic, third trimester |
| O30.049 | Twin pregnancy, dichorionic/diamniotic, unspecified trimester |
| O30.091 | Twin pregnancy, unable to determine number of placenta and number of amniotic sacs, first trimester |
| O30.092 | Twin pregnancy, unable to determine number of placenta and number of amniotic sacs, second trimester |
| O30.093 | Twin pregnancy, unable to determine number of placenta and number of amniotic sacs, third trimester |
| O30.099 | Twin pregnancy, unable to determine number of placenta and number of amniotic sacs, unspecified trimester |
| O30.101 | Triplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, first trimester |
| O30.102 | Triplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, second trimester |
| O30.103 | Triplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, third trimester |
| O30.109 | Triplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimester |
| O30.111 | Triplet pregnancy with two or more monochorionic fetuses, first trimester |
| O30.112 | Triplet pregnancy with two or more monochorionic fetuses, second trimester |
| O30.113 | Triplet pregnancy with two or more monochorionic fetuses, third trimester |
| O30.119 | Triplet pregnancy with two or more monochorionic fetuses, unspecified trimester |
| O30.121 | Triplet pregnancy with two or more monoamniotic fetuses, first trimester |
| O30.122 | Triplet pregnancy with two or more monoamniotic fetuses, second trimester |
| O30.123 | Triplet pregnancy with two or more monoamniotic fetuses, third trimester |
| O30.129 | Triplet pregnancy with two or more monoamniotic fetuses, unspecified trimester |
| O30.131 | Triplet pregnancy, trichorionic/triamniotic, first trimester |
| O30.132 | Triplet pregnancy, trichorionic/triamniotic, second trimester |
| O30.133 | Triplet pregnancy, trichorionic/triamniotic, third trimester |
| O30.139 | Triplet pregnancy, trichorionic/triamniotic, unspecified trimester |
| O30.191 | Triplet pregnancy, unable to determine number of placenta and number of amniotic sacs, first trimester |
| O30.192 | Triplet pregnancy, unable to determine number of placenta and number of amniotic sacs, second trimester |
| O30.193 | Triplet pregnancy, unable to determine number of placenta and number of amniotic sacs, third trimester |
| O30.199 | Triplet pregnancy, unable to determine number of placenta and number of amniotic sacs, unspecified trimester |
| O30.201 | Quadruplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, first trimester |
| O30.202 | Quadruplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, second trimester |
| O30.203 | Quadruplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, third trimester |
| O30.209 | Quadruplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimester |
| O30.211 | Quadruplet pregnancy with two or more monochorionic fetuses, first trimester |
| O30.212 | Quadruplet pregnancy with two or more monochorionic fetuses, second trimester |
| O30.213 | Quadruplet pregnancy with two or more monochorionic fetuses, third trimester |
| O30.219 | Quadruplet pregnancy with two or more monochorionic fetuses, unspecified trimester |
| O30.221 | Quadruplet pregnancy with two or more monoamniotic fetuses, first trimester |
| O30.222 | Quadruplet pregnancy with two or more monoamniotic fetuses, second trimester |
| O30.223 | Quadruplet pregnancy with two or more monoamniotic fetuses, third trimester |
| O30.229 | Quadruplet pregnancy with two or more monoamniotic fetuses, unspecified trimester |
| O30.231 | Quadruplet pregnancy, quadrachorionic/quadra-amniotic, first trimester |
| O30.232 | Quadruplet pregnancy, quadrachorionic/quadra-amniotic, second trimester |
| O30.233 | Quadruplet pregnancy, quadrachorionic/quadra-amniotic, third trimester |
| O30.239 | Quadruplet pregnancy, quadrachorionic/quadra-amniotic, unspecified trimester |
| O30.291 | Quadruplet pregnancy, unable to determine number of placenta and number of amniotic sacs, first trimester |
| O30.292 | Quadruplet pregnancy, unable to determine number of placenta and number of amniotic sacs, second trimester |
| O30.293 | Quadruplet pregnancy, unable to determine number of placenta and number of amniotic sacs, third trimester |
| O30.299 | Quadruplet pregnancy, unable to determine number of placenta and number of amniotic sacs, unspecified trimester |
| O30.801 | Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs, first trimester |
| O30.802 | Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs, second trimester |
| O30.803 | Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs, third trimester |
| O30.809 | Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimester |
| O30.811 | Other specified multiple gestation with two or more monochorionic fetuses, first trimester |
| O30.812 | Other specified multiple gestation with two or more monochorionic fetuses, second trimester |
| O30.813 | Other specified multiple gestation with two or more monochorionic fetuses, third trimester |
| O30.819 | Other specified multiple gestation with two or more monochorionic fetuses, unspecified trimester |
| O30.821 | Other specified multiple gestation with two or more monoamniotic fetuses, first trimester |
| O30.822 | Other specified multiple gestation with two or more monoamniotic fetuses, second trimester |
| O30.823 | Other specified multiple gestation with two or more monoamniotic fetuses, third trimester |
| O30.829 | Other specified multiple gestation with two or more monoamniotic fetuses, unspecified trimester |
| O30.831 | Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, first trimester |
| O30.832 | Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, second trimester |
| O30.833 | Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, third trimester |
| O30.839 | Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, unspecified trimester |
| O30.891 | Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, first trimester |
| O30.892 | Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, second trimester |
| O30.893 | Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, third trimester |
| O30.899 | Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, unspecified trimester |
| O30.90 | Multiple gestation, unspecified, unspecified trimester |
| O30.91 | Multiple gestation, unspecified, first trimester |
| O30.92 | Multiple gestation, unspecified, second trimester |
| O30.93 | Multiple gestation, unspecified, third trimester |
