1. O30 Multiple gestation

    1. O30.0 Twin pregnancy

      1. O30.00 Twin pregnancy, unspecified number of placenta and unspecified number of amniotic sacs

        • 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
      2. O30.01 Twin pregnancy, monochorionic/monoamniotic

        Inclusion term(s):

        • Twin pregnancy, one placenta, one amniotic sac
        • 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
      3. O30.02 Conjoined twin pregnancy

        • 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
      4. O30.03 Twin pregnancy, monochorionic/diamniotic

        Inclusion term(s):

        • Twin pregnancy, one placenta, two amniotic sacs
        • 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
      5. O30.04 Twin pregnancy, dichorionic/diamniotic

        Inclusion term(s):

        • Twin pregnancy, two placentae, two amniotic sacs
        • 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
      6. O30.09 Twin pregnancy, unable to determine number of placenta and number of amniotic sacs

        • 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
    2. O30.1 Triplet pregnancy

      1. O30.10 Triplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs

        • 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
      2. O30.11 Triplet pregnancy with two or more monochorionic fetuses

        • 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
      3. O30.12 Triplet pregnancy with two or more monoamniotic fetuses

        • 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
      4. O30.13 Triplet pregnancy, trichorionic/triamniotic

        • 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
      5. O30.19 Triplet pregnancy, unable to determine number of placenta and number of amniotic sacs

        • 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
    3. O30.2 Quadruplet pregnancy

      1. O30.20 Quadruplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs

        • 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
      2. O30.21 Quadruplet pregnancy with two or more monochorionic fetuses

        • 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
      3. O30.22 Quadruplet pregnancy with two or more monoamniotic fetuses

        • 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
      4. O30.23 Quadruplet pregnancy, quadrachorionic/quadra-amniotic

        • 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
      5. O30.29 Quadruplet pregnancy, unable to determine number of placenta and number of amniotic sacs

        • 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
    4. O30.8 Other specified multiple gestation

      Inclusion term(s):

      • Multiple gestation pregnancy greater then quadruplets
      1. O30.80 Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs

        • 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
      2. O30.81 Other specified multiple gestation with two or more monochorionic fetuses

        • 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
      3. O30.82 Other specified multiple gestation with two or more monoamniotic fetuses

        • 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
      4. O30.83 Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses

        Inclusion term(s):

        • Pentachorionic, penta-amniotic pregnancy (quintuplets)
        • Hexachorionic, hexa-amniotic pregnancy (sextuplets)
        • Heptachorionic, hepta-amniotic pregnancy (septuplets)
        • 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
      5. O30.89 Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs

        • 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
    5. O30.9 Multiple gestation, unspecified

      Inclusion term(s):

      • Multiple pregnancy NOS
      1. O30.90 Multiple gestation, unspecified, unspecified trimester

      2. O30.91 Multiple gestation, unspecified, first trimester

      3. O30.92 Multiple gestation, unspecified, second trimester

      4. O30.93 Multiple gestation, unspecified, third trimester

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.