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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  • O41.1019|

    Infection of amniotic sac and membranes, unspecified, first trimester, other fetus

  • O41.102|

    Infection of amniotic sac and membranes, unspecified, second trimester

  • O41.1020|

    Infection of amniotic sac and membranes, unspecified, second trimester, not applicable or unspecified

  • O41.1021|

    Infection of amniotic sac and membranes, unspecified, second trimester, fetus 1

  • O41.1022|

    Infection of amniotic sac and membranes, unspecified, second trimester, fetus 2

  • O41.1023|

    Infection of amniotic sac and membranes, unspecified, second trimester, fetus 3

  • O41.1024|

    Infection of amniotic sac and membranes, unspecified, second trimester, fetus 4

  • O41.1025|

    Infection of amniotic sac and membranes, unspecified, second trimester, fetus 5

  • O41.1029|

    Infection of amniotic sac and membranes, unspecified, second trimester, other fetus

  • O41.103|

    Infection of amniotic sac and membranes, unspecified, third trimester

  • O41.1030|

    Infection of amniotic sac and membranes, unspecified, third trimester, not applicable or unspecified

  • O41.1031|

    Infection of amniotic sac and membranes, unspecified, third trimester, fetus 1

  • O41.1032|

    Infection of amniotic sac and membranes, unspecified, third trimester, fetus 2

  • O41.1033|

    Infection of amniotic sac and membranes, unspecified, third trimester, fetus 3

  • O41.1034|

    Infection of amniotic sac and membranes, unspecified, third trimester, fetus 4

  • O41.1035|

    Infection of amniotic sac and membranes, unspecified, third trimester, fetus 5

  • O41.1039|

    Infection of amniotic sac and membranes, unspecified, third trimester, other fetus

  • O41.109|

    Infection of amniotic sac and membranes, unspecified, unspecified trimester

  • O41.1090|

    Infection of amniotic sac and membranes, unspecified, unspecified trimester, not applicable or unspecified

  • O41.1091|

    Infection of amniotic sac and membranes, unspecified, unspecified trimester, fetus 1

  • O41.1092|

    Infection of amniotic sac and membranes, unspecified, unspecified trimester, fetus 2

  • O41.1093|

    Infection of amniotic sac and membranes, unspecified, unspecified trimester, fetus 3

  • O41.1094|

    Infection of amniotic sac and membranes, unspecified, unspecified trimester, fetus 4

  • O41.1095|

    Infection of amniotic sac and membranes, unspecified, unspecified trimester, fetus 5

  • O41.1099|

    Infection of amniotic sac and membranes, unspecified, unspecified trimester, other fetus

  • O41.12|

    Chorioamnionitis

  • O41.121|

    Chorioamnionitis, first trimester

  • O41.1210|

    Chorioamnionitis, first trimester, not applicable or unspecified

  • O41.1211|

    Chorioamnionitis, first trimester, fetus 1

  • O41.1212|

    Chorioamnionitis, first trimester, fetus 2

  • O41.1213|

    Chorioamnionitis, first trimester, fetus 3

  • O41.1214|

    Chorioamnionitis, first trimester, fetus 4

  • O41.1215|

    Chorioamnionitis, first trimester, fetus 5

  • O41.1219|

    Chorioamnionitis, first trimester, other fetus

  • O41.122|

    Chorioamnionitis, second trimester

  • O41.1220|

    Chorioamnionitis, second trimester, not applicable or unspecified

  • O41.1221|

    Chorioamnionitis, second trimester, fetus 1

  • O41.1222|

    Chorioamnionitis, second trimester, fetus 2

  • O41.1223|

    Chorioamnionitis, second trimester, fetus 3

  • O41.1224|

    Chorioamnionitis, second trimester, fetus 4

  • O41.1225|

    Chorioamnionitis, second trimester, fetus 5

  • O41.1229|

    Chorioamnionitis, second trimester, other fetus

  • O41.123|

    Chorioamnionitis, third trimester

  • O41.1230|

    Chorioamnionitis, third trimester, not applicable or unspecified

  • O41.1231|

    Chorioamnionitis, third trimester, fetus 1

  • O41.1232|

    Chorioamnionitis, third trimester, fetus 2

  • O41.1233|

    Chorioamnionitis, third trimester, fetus 3

  • O41.1234|

    Chorioamnionitis, third trimester, fetus 4

  • O41.1235|

    Chorioamnionitis, third trimester, fetus 5

  • O41.1239|

    Chorioamnionitis, third trimester, other fetus

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