1. O36 Maternal care for other fetal problems

    Includes:

    • the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy

    Excludes1

    • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
    • placental transfusion syndromes (O43.0-)

    Excludes2

    • labor and delivery complicated by fetal stress (O77.-)

    One of the following 7th characters is to be assigned to each code under category O36. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O36 that has a 7th character of 1 through 9.

    • 0 - not applicable or unspecified
    • 1 - fetus 1
    • 2 - fetus 2
    • 3 - fetus 3
    • 4 - fetus 4
    • 5 - fetus 5
    • 9 - other fetus
    1. O36.0 Maternal care for rhesus isoimmunization

      Inclusion term(s):

      • Maternal care for Rh incompatibility (with hydrops fetalis)
      1. 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
      2. 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
    2. O36.1 Maternal care for other isoimmunization

      Inclusion term(s):

      • Maternal care for ABO isoimmunization
      1. O36.11 Maternal care for Anti-A sensitization

        Inclusion term(s):

        • Maternal care for isoimmunization NOS (with hydrops fetalis)
        • 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
      2. O36.19 Maternal care for other isoimmunization

        Inclusion term(s):

        • Maternal care for Anti-B sensitization
        • 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
    3. O36.2 Maternal care for hydrops fetalis

      Inclusion term(s):

      • Maternal care for hydrops fetalis NOS
      • Maternal care for hydrops fetalis not associated with isoimmunization
      1. O36.20 Maternal care for hydrops fetalis, unspecified trimester

      2. O36.21 Maternal care for hydrops fetalis, first trimester

      3. O36.22 Maternal care for hydrops fetalis, second trimester

      4. O36.23 Maternal care for hydrops fetalis, third trimester

    4. O36.4 Maternal care for intrauterine death

      Inclusion term(s):

      • Maternal care for intrauterine fetal death NOS
      • Maternal care for intrauterine fetal death after completion of 20 weeks of gestation
      • Maternal care for late fetal death
      • Maternal care for missed delivery
    5. O36.5 Maternal care for known or suspected poor fetal growth

      1. 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
      2. O36.59 Maternal care for other known or suspected poor fetal growth

        Inclusion term(s):

        • Maternal care for known or suspected light-for-dates NOS
        • Maternal care for known or suspected small-for-dates NOS
        • 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
    6. O36.6 Maternal care for excessive fetal growth

      Inclusion term(s):

      • Maternal care for known or suspected large-for-dates
      1. O36.60 Maternal care for excessive fetal growth, unspecified trimester

      2. O36.61 Maternal care for excessive fetal growth, first trimester

      3. O36.62 Maternal care for excessive fetal growth, second trimester

      4. O36.63 Maternal care for excessive fetal growth, third trimester

    7. O36.7 Maternal care for viable fetus in abdominal pregnancy

      1. O36.70 Maternal care for viable fetus in abdominal pregnancy, unspecified trimester

      2. O36.71 Maternal care for viable fetus in abdominal pregnancy, first trimester

      3. O36.72 Maternal care for viable fetus in abdominal pregnancy, second trimester

      4. O36.73 Maternal care for viable fetus in abdominal pregnancy, third trimester

    8. O36.8 Maternal care for other specified fetal problems

      1. O36.80 Pregnancy with inconclusive fetal viability

        Inclusion term(s):

        • Encounter to determine fetal viability of pregnancy
      2. 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
      3. 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
      4. O36.83 Maternal care for abnormalities of the fetal heart rate or rhythm

        Inclusion term(s):

        • Maternal care for depressed fetal heart rate tones
        • Maternal care for fetal bradycardia
        • Maternal care for fetal heart rate abnormal variability
        • Maternal care for fetal heart rate decelerations
        • Maternal care for fetal heart rate irregularity
        • Maternal care for fetal tachycardia
        • Maternal care for non-reassuring fetal heart rate or rhythm
        • O36.831 Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester
        • O36.832 Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester
        • O36.833 Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester
        • O36.839 Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester
      5. 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
    9. O36.9 Maternal care for fetal problem, unspecified

      1. O36.90 Maternal care for fetal problem, unspecified, unspecified trimester

      2. O36.91 Maternal care for fetal problem, unspecified, first trimester

      3. O36.92 Maternal care for fetal problem, unspecified, second trimester

      4. O36.93 Maternal care for fetal problem, 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.