1. O35 Maternal care for known or suspected fetal abnormality and damage

    Includes:

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

    Excludes1

    • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)

    One of the following 7th characters is to be assigned to each code under category O35. 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 O35 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. O35.0 Maternal care for (suspected) central nervous system malformation in fetus

      1. O35.00 Maternal care for (suspected) central nervous system malformation or damage in fetus, unspecified

      2. O35.01 Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum

      3. O35.02 Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly

      4. O35.03 Maternal care for (suspected) central nervous system malformation or damage in fetus, choroid plexus cysts

      5. O35.04 Maternal care for (suspected) central nervous system malformation or damage in fetus, encephalocele

      6. O35.05 Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephaly

      7. O35.06 Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly

        Inclusion term(s):

        • Maternal care for fetal hydrocephalus
      8. O35.07 Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly

      9. O35.08 Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida

      10. O35.09 Maternal care for (suspected) other central nervous system malformation or damage in fetus

    2. O35.1 Maternal care for (suspected) chromosomal abnormality in fetus

      1. O35.10 Maternal care for (suspected) chromosomal abnormality in fetus, unspecified

      2. O35.11 Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13

      3. O35.12 Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18

      4. O35.13 Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21

      5. O35.14 Maternal care for (suspected) chromosomal abnormality in fetus, Turner Syndrome

      6. O35.15 Maternal care for (suspected) chromosomal abnormality in fetus, sex chromosome abnormality

      7. O35.19 Maternal care for (suspected) chromosomal abnormality in fetus, other chromosomal abnormality

    3. O35.2 Maternal care for (suspected) hereditary disease in fetus

    4. O35.3 Maternal care for (suspected) damage to fetus from viral disease in mother

      Inclusion term(s):

      • Maternal care for damage to fetus from maternal cytomegalovirus infection
      • Maternal care for damage to fetus from maternal rubella
    5. O35.4 Maternal care for (suspected) damage to fetus from alcohol

    6. O35.5 Maternal care for (suspected) damage to fetus by drugs

      Inclusion term(s):

      • Maternal care for damage to fetus from drug addiction
    7. O35.6 Maternal care for (suspected) damage to fetus by radiation

    8. O35.7 Maternal care for (suspected) damage to fetus by other medical procedures

      Inclusion term(s):

      • Maternal care for damage to fetus by amniocentesis
      • Maternal care for damage to fetus by biopsy procedures
      • Maternal care for damage to fetus by hematological investigation
      • Maternal care for damage to fetus by intrauterine contraceptive device
      • Maternal care for damage to fetus by intrauterine surgery
    9. O35.8 Maternal care for other (suspected) fetal abnormality and damage

      Inclusion term(s):

      • Maternal care for damage to fetus from maternal listeriosis
      • Maternal care for damage to fetus from maternal toxoplasmosis
    10. O35.9 Maternal care for (suspected) fetal abnormality and damage, unspecified

    11. O35.A Maternal care for other (suspected) fetal abnormality and damage, fetal facial anomalies

    12. O35.B Maternal care for other (suspected) fetal abnormality and damage, fetal cardiac anomalies

    13. O35.C Maternal care for other (suspected) fetal abnormality and damage, fetal pulmonary anomalies

    14. O35.D Maternal care for other (suspected) fetal abnormality and damage, fetal gastrointestinal anomalies

    15. O35.E Maternal care for other (suspected) fetal abnormality and damage, fetal genitourinary anomalies

    16. O35.F Maternal care for other (suspected) fetal abnormality and damage, fetal musculoskeletal anomalies of trunk

    17. O35.G Maternal care for other (suspected) fetal abnormality and damage, fetal upper extremities anomalies

    18. O35.H Maternal care for other (suspected) fetal abnormality and damage, fetal lower extremities anomalies

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.