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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  • O31.13X9|

    Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, other fetus

  • O31.2|

    Continuing pregnancy after intrauterine death of one fetus or more

  • O31.20|

    Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester

  • O31.20X0|

    Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, not applicable or unspecified

  • O31.20X1|

    Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, fetus 1

  • O31.20X2|

    Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, fetus 2

  • O31.20X3|

    Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, fetus 3

  • O31.20X4|

    Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, fetus 4

  • O31.20X5|

    Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, fetus 5

  • O31.20X9|

    Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, other fetus

  • O31.21|

    Continuing pregnancy after intrauterine death of one fetus or more, first trimester

  • O31.21X0|

    Continuing pregnancy after intrauterine death of one fetus or more, first trimester, not applicable or unspecified

  • O31.21X1|

    Continuing pregnancy after intrauterine death of one fetus or more, first trimester, fetus 1

  • O31.21X2|

    Continuing pregnancy after intrauterine death of one fetus or more, first trimester, fetus 2

  • O31.21X3|

    Continuing pregnancy after intrauterine death of one fetus or more, first trimester, fetus 3

  • O31.21X4|

    Continuing pregnancy after intrauterine death of one fetus or more, first trimester, fetus 4

  • O31.21X5|

    Continuing pregnancy after intrauterine death of one fetus or more, first trimester, fetus 5

  • O31.21X9|

    Continuing pregnancy after intrauterine death of one fetus or more, first trimester, other fetus

  • O31.22|

    Continuing pregnancy after intrauterine death of one fetus or more, second trimester

  • O31.22X0|

    Continuing pregnancy after intrauterine death of one fetus or more, second trimester, not applicable or unspecified

  • O31.22X1|

    Continuing pregnancy after intrauterine death of one fetus or more, second trimester, fetus 1

  • O31.22X2|

    Continuing pregnancy after intrauterine death of one fetus or more, second trimester, fetus 2

  • O31.22X3|

    Continuing pregnancy after intrauterine death of one fetus or more, second trimester, fetus 3

  • O31.22X4|

    Continuing pregnancy after intrauterine death of one fetus or more, second trimester, fetus 4

  • O31.22X5|

    Continuing pregnancy after intrauterine death of one fetus or more, second trimester, fetus 5

  • O31.22X9|

    Continuing pregnancy after intrauterine death of one fetus or more, second trimester, other fetus

  • O31.23|

    Continuing pregnancy after intrauterine death of one fetus or more, third trimester

  • O31.23X0|

    Continuing pregnancy after intrauterine death of one fetus or more, third trimester, not applicable or unspecified

  • O31.23X1|

    Continuing pregnancy after intrauterine death of one fetus or more, third trimester, fetus 1

  • O31.23X2|

    Continuing pregnancy after intrauterine death of one fetus or more, third trimester, fetus 2

  • O31.23X3|

    Continuing pregnancy after intrauterine death of one fetus or more, third trimester, fetus 3

  • O31.23X4|

    Continuing pregnancy after intrauterine death of one fetus or more, third trimester, fetus 4

  • O31.23X5|

    Continuing pregnancy after intrauterine death of one fetus or more, third trimester, fetus 5

  • O31.23X9|

    Continuing pregnancy after intrauterine death of one fetus or more, third trimester, other fetus

  • O31.3|

    Continuing pregnancy after elective fetal reduction of one fetus or more

  • O31.30|

    Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester

  • O31.30X0|

    Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, not applicable or unspecified

  • O31.30X1|

    Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, fetus 1

  • O31.30X2|

    Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, fetus 2

  • O31.30X3|

    Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, fetus 3

  • O31.30X4|

    Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, fetus 4

  • O31.30X5|

    Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, fetus 5

  • O31.30X9|

    Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, other fetus

  • O31.31|

    Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester

  • O31.31X0|

    Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, not applicable or unspecified

  • O31.31X1|

    Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, fetus 1

  • O31.31X2|

    Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, fetus 2

  • O31.31X3|

    Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, fetus 3

  • O31.31X4|

    Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, fetus 4

  • O31.31X5|

    Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, fetus 5

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