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.
Internal Codes
  • O30.123

    Triplet pregnancy with two or more monoamniotic fetuses, third trimester

  • O30.129

    Triplet pregnancy with two or more monoamniotic fetuses, unspecified trimester

  • O30.131

    Triplet pregnancy, trichorionic/triamniotic, first trimester

  • O30.132

    Triplet pregnancy, trichorionic/triamniotic, second trimester

  • O30.133

    Triplet pregnancy, trichorionic/triamniotic, third trimester

  • O30.139

    Triplet pregnancy, trichorionic/triamniotic, unspecified trimester

  • O30.191

    Triplet pregnancy, unable to determine number of placenta and number of amniotic sacs, first trimester

  • O30.192

    Triplet pregnancy, unable to determine number of placenta and number of amniotic sacs, second trimester

  • O30.193

    Triplet pregnancy, unable to determine number of placenta and number of amniotic sacs, third trimester

  • O30.199

    Triplet pregnancy, unable to determine number of placenta and number of amniotic sacs, unspecified trimester

  • O30.201

    Quadruplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, first trimester

  • O30.202

    Quadruplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, second trimester

  • O30.203

    Quadruplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, third trimester

  • O30.209

    Quadruplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimester

  • O30.211

    Quadruplet pregnancy with two or more monochorionic fetuses, first trimester

  • O30.212

    Quadruplet pregnancy with two or more monochorionic fetuses, second trimester

  • O30.213

    Quadruplet pregnancy with two or more monochorionic fetuses, third trimester

  • O30.219

    Quadruplet pregnancy with two or more monochorionic fetuses, unspecified trimester

  • O30.221

    Quadruplet pregnancy with two or more monoamniotic fetuses, first trimester

  • O30.222

    Quadruplet pregnancy with two or more monoamniotic fetuses, second trimester

  • O30.223

    Quadruplet pregnancy with two or more monoamniotic fetuses, third trimester

  • O30.229

    Quadruplet pregnancy with two or more monoamniotic fetuses, unspecified trimester

  • O30.231

    Quadruplet pregnancy, quadrachorionic/quadra-amniotic, first trimester

  • O30.232

    Quadruplet pregnancy, quadrachorionic/quadra-amniotic, second trimester

  • O30.233

    Quadruplet pregnancy, quadrachorionic/quadra-amniotic, third trimester

  • O30.239

    Quadruplet pregnancy, quadrachorionic/quadra-amniotic, unspecified trimester

  • O30.291

    Quadruplet pregnancy, unable to determine number of placenta and number of amniotic sacs, first trimester

  • O30.292

    Quadruplet pregnancy, unable to determine number of placenta and number of amniotic sacs, second trimester

  • O30.293

    Quadruplet pregnancy, unable to determine number of placenta and number of amniotic sacs, third trimester

  • O30.299

    Quadruplet pregnancy, unable to determine number of placenta and number of amniotic sacs, unspecified trimester

  • O30.801

    Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs, first trimester

  • O30.802

    Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs, second trimester

  • O30.803

    Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs, third trimester

  • O30.809

    Other specified multiple gestation, unspecified number of placenta and unspecified number of amniotic sacs, unspecified trimester

  • O30.811

    Other specified multiple gestation with two or more monochorionic fetuses, first trimester

  • O30.812

    Other specified multiple gestation with two or more monochorionic fetuses, second trimester

  • O30.813

    Other specified multiple gestation with two or more monochorionic fetuses, third trimester

  • O30.819

    Other specified multiple gestation with two or more monochorionic fetuses, unspecified trimester

  • O30.821

    Other specified multiple gestation with two or more monoamniotic fetuses, first trimester

  • O30.822

    Other specified multiple gestation with two or more monoamniotic fetuses, second trimester

  • O30.823

    Other specified multiple gestation with two or more monoamniotic fetuses, third trimester

  • O30.829

    Other specified multiple gestation with two or more monoamniotic fetuses, unspecified trimester

  • O30.831

    Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, first trimester

  • O30.832

    Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, second trimester

  • O30.833

    Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, third trimester

  • O30.839

    Other specified multiple gestation, number of chorions and amnions are both equal to the number of fetuses, unspecified trimester

  • O30.891

    Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, first trimester

  • O30.892

    Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, second trimester

  • O30.893

    Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, third trimester

  • O30.899

    Other specified multiple gestation, unable to determine number of placenta and number of amniotic sacs, unspecified trimester

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