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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