| ICD-10 Code | Description |
| 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 |
