All ICD10 Codes
Chapter 15

O00–O9A: Pregnancy, Childbirth and the Puerperium

Pregnancy, Childbirth and the Puerperium diagnostic classification updated for 2026.

Chapter Instructions

Excludes1(Not coded here. Use a different code.)
  • supervision of normal pregnancy (Z34.-)
Excludes2(Not included here. Code separately if applicable.)
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)
Use Additional Code
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
All CodesBillable Only
Internal Codes
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  • O35.08X1—

    Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 1

  • O35.08X2—

    Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 2

  • O35.08X3—

    Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 3

  • O35.08X4—

    Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 4

  • O35.08X5—

    Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 5

  • O35.08X9—

    Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, other fetus

  • O35.09—

    Maternal care for (suspected) other central nervous system malformation or damage in fetus

  • O35.09X0—

    Maternal care for (suspected) other central nervous system malformation or damage in fetus, not applicable or unspecified

  • O35.09X1—

    Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 1

  • O35.09X2—

    Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 2

  • O35.09X3—

    Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 3

  • O35.09X4—

    Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 4

  • O35.09X5—

    Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 5

  • O35.09X9—

    Maternal care for (suspected) other central nervous system malformation or damage in fetus, other fetus

  • O35.1—

    Maternal care for (suspected) chromosomal abnormality in fetus

  • O35.10—

    Maternal care for (suspected) chromosomal abnormality in fetus, unspecified

  • O35.10X0—

    Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, not applicable or unspecified

  • O35.10X1—

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

  • O35.10X2—

    Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 2

  • O35.10X3—

    Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 3

  • O35.10X4—

    Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 4

  • O35.10X5—

    Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 5

  • O35.10X9—

    Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, other fetus

  • O35.11—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13

  • O35.11X0—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, not applicable or unspecified

  • O35.11X1—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, fetus 1

  • O35.11X2—

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

  • O35.11X3—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, fetus 3

  • O35.11X4—

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

  • O35.11X5—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, fetus 5

  • O35.11X9—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13, other fetus

  • O35.12—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18

  • O35.12X0—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, not applicable or unspecified

  • O35.12X1—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 1

  • O35.12X2—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 2

  • O35.12X3—

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

  • O35.12X4—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 4

  • O35.12X5—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, fetus 5

  • O35.12X9—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18, other fetus

  • O35.13—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21

  • O35.13X0—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, not applicable or unspecified

  • O35.13X1—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, fetus 1

  • O35.13X2—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, fetus 2

  • O35.13X3—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, fetus 3

  • O35.13X4—

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

  • O35.13X5—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, fetus 5

  • O35.13X9—

    Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21, other fetus

  • O35.14—

    Maternal care for (suspected) chromosomal abnormality in fetus, Turner Syndrome

  • O35.14X0—

    Maternal care for (suspected) chromosomal abnormality in fetus, Turner Syndrome, not applicable or unspecified

  • O35.14X1—

    Maternal care for (suspected) chromosomal abnormality in fetus, Turner Syndrome, fetus 1

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