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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  • O31.11X5—

    Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester, fetus 5

  • O31.11X9—

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

  • O31.12—

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

  • O31.12X0—

    Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, not applicable or unspecified

  • O31.12X1—

    Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, fetus 1

  • O31.12X2—

    Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, fetus 2

  • O31.12X3—

    Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, fetus 3

  • O31.12X4—

    Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, fetus 4

  • O31.12X5—

    Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, fetus 5

  • O31.12X9—

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

  • O31.13—

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

  • O31.13X0—

    Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, not applicable or unspecified

  • O31.13X1—

    Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, fetus 1

  • O31.13X2—

    Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, fetus 2

  • O31.13X3—

    Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, fetus 3

  • O31.13X4—

    Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, fetus 4

  • O31.13X5—

    Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, fetus 5

  • O31.13X9—

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

  • 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

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