| O35 | Maternal care for known or suspected fetal abnormality and damage |
| O35.0 | Maternal care for (suspected) central nervous system malformation in fetus |
| O35.1 | Maternal care for (suspected) chromosomal abnormality in fetus |
| O35.2 | Maternal care for (suspected) hereditary disease in fetus |
| O35.3 | Maternal care for (suspected) damage to fetus from viral disease in mother |
| O35.4 | Maternal care for (suspected) damage to fetus from alcohol |
| O35.5 | Maternal care for (suspected) damage to fetus by drugs |
| O35.6 | Maternal care for (suspected) damage to fetus by radiation |
| O35.7 | Maternal care for (suspected) damage to fetus by other medical procedures |
| O35.8 | Maternal care for other (suspected) fetal abnormality and damage |
| O35.9 | Maternal care for (suspected) fetal abnormality and damage, unspecified |
| O36 | Maternal care for other fetal problems |
| O36.0 | Maternal care for rhesus isoimmunization |
| O36.01 | Maternal care for anti-D [Rh] antibodies |
| O36.011 | Maternal care for anti-D [Rh] antibodies, first trimester |
| O36.012 | Maternal care for anti-D [Rh] antibodies, second trimester |
| O36.013 | Maternal care for anti-D [Rh] antibodies, third trimester |
| O36.019 | Maternal care for anti-D [Rh] antibodies, unspecified trimester |
| O36.09 | Maternal care for other rhesus isoimmunization |
| O36.091 | Maternal care for other rhesus isoimmunization, first trimester |
| O36.092 | Maternal care for other rhesus isoimmunization, second trimester |
| O36.093 | Maternal care for other rhesus isoimmunization, third trimester |
| O36.099 | Maternal care for other rhesus isoimmunization, unspecified trimester |
| O36.1 | Maternal care for other isoimmunization |
| O36.11 | Maternal care for Anti-A sensitization |
| O36.111 | Maternal care for Anti-A sensitization, first trimester |
| O36.112 | Maternal care for Anti-A sensitization, second trimester |
| O36.113 | Maternal care for Anti-A sensitization, third trimester |
| O36.119 | Maternal care for Anti-A sensitization, unspecified trimester |
| O36.19 | Maternal care for other isoimmunization |
| O36.191 | Maternal care for other isoimmunization, first trimester |
| O36.192 | Maternal care for other isoimmunization, second trimester |
| O36.193 | Maternal care for other isoimmunization, third trimester |
| O36.199 | Maternal care for other isoimmunization, unspecified trimester |
| O36.2 | Maternal care for hydrops fetalis |
| O36.20 | Maternal care for hydrops fetalis, unspecified trimester |
| O36.21 | Maternal care for hydrops fetalis, first trimester |
| O36.22 | Maternal care for hydrops fetalis, second trimester |
| O36.23 | Maternal care for hydrops fetalis, third trimester |
| O36.4 | Maternal care for intrauterine death |
| O36.5 | Maternal care for known or suspected poor fetal growth |
| O36.51 | Maternal care for known or suspected placental insufficiency |
| O36.511 | Maternal care for known or suspected placental insufficiency, first trimester |
| O36.512 | Maternal care for known or suspected placental insufficiency, second trimester |
| O36.513 | Maternal care for known or suspected placental insufficiency, third trimester |
| O36.519 | Maternal care for known or suspected placental insufficiency, unspecified trimester |
| O36.59 | Maternal care for other known or suspected poor fetal growth |
| O36.591 | Maternal care for other known or suspected poor fetal growth, first trimester |
| O36.592 | Maternal care for other known or suspected poor fetal growth, second trimester |
| O36.593 | Maternal care for other known or suspected poor fetal growth, third trimester |
| O36.599 | Maternal care for other known or suspected poor fetal growth, unspecified trimester |
| O36.6 | Maternal care for excessive fetal growth |
| O36.60 | Maternal care for excessive fetal growth, unspecified trimester |
| O36.61 | Maternal care for excessive fetal growth, first trimester |
| O36.62 | Maternal care for excessive fetal growth, second trimester |
| O36.63 | Maternal care for excessive fetal growth, third trimester |
| O36.7 | Maternal care for viable fetus in abdominal pregnancy |
| O36.70 | Maternal care for viable fetus in abdominal pregnancy, unspecified trimester |
| O36.71 | Maternal care for viable fetus in abdominal pregnancy, first trimester |
| O36.72 | Maternal care for viable fetus in abdominal pregnancy, second trimester |
| O36.73 | Maternal care for viable fetus in abdominal pregnancy, third trimester |
| O36.8 | Maternal care for other specified fetal problems |
| O36.80 | Pregnancy with inconclusive fetal viability |
| O36.81 | Decreased fetal movements |
| O36.812 | Decreased fetal movements, second trimester |
| O36.813 | Decreased fetal movements, third trimester |
| O36.819 | Decreased fetal movements, unspecified trimester |
| O36.82 | Fetal anemia and thrombocytopenia |
| O36.821 | Fetal anemia and thrombocytopenia, first trimester |
| O36.822 | Fetal anemia and thrombocytopenia, second trimester |
| O36.823 | Fetal anemia and thrombocytopenia, third trimester |
| O36.829 | Fetal anemia and thrombocytopenia, unspecified trimester |
| O36.89 | Maternal care for other specified fetal problems |
| O36.891 | Maternal care for other specified fetal problems, first trimester |
| O36.892 | Maternal care for other specified fetal problems, second trimester |
| O36.893 | Maternal care for other specified fetal problems, third trimester |
| O36.899 | Maternal care for other specified fetal problems, unspecified trimester |
| O36.9 | Maternal care for fetal problem, unspecified |
| O36.90 | Maternal care for fetal problem, unspecified, unspecified trimester |
| O36.91 | Maternal care for fetal problem, unspecified, first trimester |
| O36.92 | Maternal care for fetal problem, unspecified, second trimester |
| O36.93 | Maternal care for fetal problem, unspecified, third trimester |