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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  • O41.1219—

    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

  • O41.129—

    Chorioamnionitis, unspecified trimester

  • O41.1290—

    Chorioamnionitis, unspecified trimester, not applicable or unspecified

  • O41.1291—

    Chorioamnionitis, unspecified trimester, fetus 1

  • O41.1292—

    Chorioamnionitis, unspecified trimester, fetus 2

  • O41.1293—

    Chorioamnionitis, unspecified trimester, fetus 3

  • O41.1294—

    Chorioamnionitis, unspecified trimester, fetus 4

  • O41.1295—

    Chorioamnionitis, unspecified trimester, fetus 5

  • O41.1299—

    Chorioamnionitis, unspecified trimester, other fetus

  • O41.141—

    Placentitis, first trimester

  • O41.1410—

    Placentitis, first trimester, not applicable or unspecified

  • O41.1411—

    Placentitis, first trimester, fetus 1

  • O41.1412—

    Placentitis, first trimester, fetus 2

  • O41.1413—

    Placentitis, first trimester, fetus 3

  • O41.1414—

    Placentitis, first trimester, fetus 4

  • O41.1415—

    Placentitis, first trimester, fetus 5

  • O41.1419—

    Placentitis, first trimester, other fetus

  • O41.142—

    Placentitis, second trimester

  • O41.1420—

    Placentitis, second trimester, not applicable or unspecified

  • O41.1421—

    Placentitis, second trimester, fetus 1

  • O41.1422—

    Placentitis, second trimester, fetus 2

  • O41.1423—

    Placentitis, second trimester, fetus 3

  • O41.1424—

    Placentitis, second trimester, fetus 4

  • O41.1425—

    Placentitis, second trimester, fetus 5

  • O41.1429—

    Placentitis, second trimester, other fetus

  • O41.143—

    Placentitis, third trimester

  • O41.1430—

    Placentitis, third trimester, not applicable or unspecified

  • O41.1431—

    Placentitis, third trimester, fetus 1

  • O41.1432—

    Placentitis, third trimester, fetus 2

  • O41.1433—

    Placentitis, third trimester, fetus 3

  • O41.1434—

    Placentitis, third trimester, fetus 4

  • O41.1435—

    Placentitis, third trimester, fetus 5

  • O41.1439—

    Placentitis, third trimester, other fetus

  • O41.149—

    Placentitis, unspecified trimester

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