| Code | Display | Definition |
| O00.11 | Tubal pregnancy with intrauterine pregnancy | |
| O00.111 | Right tubal pregnancy with intrauterine pregnancy | |
| O00.112 | Left tubal pregnancy with intrauterine pregnancy | |
| O00.119 | Unspecified tubal pregnancy with intrauterine pregnancy | |
| O00.21 | Ovarian pregnancy with intrauterine pregnancy | |
| O00.211 | Right ovarian pregnancy with intrauterine pregnancy | |
| O00.219 | Unspecified ovarian pregnancy with intrauterine pregnancy | |
| O30.1 | Triplet pregnancy | |
| 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 | |
| O30.2 | Quadruplet pregnancy | |
| 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 | |
| O30.8 | Other specified multiple gestation | |
| O30.83 | Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses | |
| 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 | |
| O36.83 | Maternal care for abnormalities of the fetal heart rate or rhythm | |
| O36.831 | Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester | |
| O36.8310 | Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester, not applicable or unspecified | |
| O36.8311 | Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester, fetus 1 | |
| O36.8312 | Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester, fetus 2 | |
| O36.8313 | Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester, fetus 3 | |
| O36.8314 | Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester, fetus 4 | |
| O36.8315 | Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester, fetus 5 | |
| O36.8319 | Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester, other fetus | |
| O36.832 | Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester | |
| O36.8320 | Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester, not applicable or unspecified | |
| O36.8321 | Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester, fetus 1 | |
| O36.8322 | Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester, fetus 2 | |
| O36.8323 | Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester, fetus 3 | |
| O36.8324 | Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester, fetus 4 | |
| O36.8325 | Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester, fetus 5 | |
| O36.8329 | Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester, other fetus | |
| O36.833 | Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester | |
| O36.8330 | Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester, not applicable or unspecified | |
| O36.8331 | Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester, fetus 1 | |
| O36.8332 | Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester, fetus 2 | |
| O36.8333 | Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester, fetus 3 | |
| O36.8334 | Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester, fetus 4 | |
| O36.8335 | Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester, fetus 5 | |
| O36.8339 | Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester, other fetus | |
| O36.839 | Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester | |
| O36.8390 | Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, not applicable or unspecified | |
| O36.8391 | Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, fetus 1 | |
| O36.8392 | Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, fetus 2 | |
| O36.8393 | Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, fetus 3 | |
| O36.8394 | Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, fetus 4 | |
| O36.8395 | Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, fetus 5 | |
| O36.8399 | Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, other fetus | |