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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  • O98.9|

    Unspecified maternal infectious and parasitic disease complicating pregnancy, childbirth and the puerperium

  • O98.91|

    Unspecified maternal infectious and parasitic disease complicating pregnancy

  • O98.911|

    Unspecified maternal infectious and parasitic disease complicating pregnancy, first trimester

  • O98.912|

    Unspecified maternal infectious and parasitic disease complicating pregnancy, second trimester

  • O98.913|

    Unspecified maternal infectious and parasitic disease complicating pregnancy, third trimester

  • O98.919|

    Unspecified maternal infectious and parasitic disease complicating pregnancy, unspecified trimester

  • O98.92|

    Unspecified maternal infectious and parasitic disease complicating childbirth

  • O98.93|

    Unspecified maternal infectious and parasitic disease complicating the puerperium

  • O99|

    Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

  • O99.0|

    Anemia complicating pregnancy, childbirth and the puerperium

  • O99.01|

    Anemia complicating pregnancy

  • O99.011|

    Anemia complicating pregnancy, first trimester

  • O99.012|

    Anemia complicating pregnancy, second trimester

  • O99.013|

    Anemia complicating pregnancy, third trimester

  • O99.019|

    Anemia complicating pregnancy, unspecified trimester

  • O99.02|

    Anemia complicating childbirth

  • O99.03|

    Anemia complicating the puerperium

  • O99.1|

    Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium

  • O99.11|

    Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy

  • O99.111|

    Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, first trimester

  • O99.112|

    Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, second trimester

  • O99.113|

    Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, third trimester

  • O99.119|

    Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, unspecified trimester

  • O99.12|

    Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating childbirth

  • O99.13|

    Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating the puerperium

  • O99.2|

    Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium

  • O99.21|

    Obesity complicating pregnancy, childbirth, and the puerperium

  • O99.210|

    Obesity complicating pregnancy, unspecified trimester

  • O99.211|

    Obesity complicating pregnancy, first trimester

  • O99.212|

    Obesity complicating pregnancy, second trimester

  • O99.213|

    Obesity complicating pregnancy, third trimester

  • O99.214|

    Obesity complicating childbirth

  • O99.215|

    Obesity complicating the puerperium

  • O99.28|

    Other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium

  • O99.280|

    Endocrine, nutritional and metabolic diseases complicating pregnancy, unspecified trimester

  • O99.281|

    Endocrine, nutritional and metabolic diseases complicating pregnancy, first trimester

  • O99.282|

    Endocrine, nutritional and metabolic diseases complicating pregnancy, second trimester

  • O99.283|

    Endocrine, nutritional and metabolic diseases complicating pregnancy, third trimester

  • O99.284|

    Endocrine, nutritional and metabolic diseases complicating childbirth

  • O99.285|

    Endocrine, nutritional and metabolic diseases complicating the puerperium

  • O99.3|

    Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium

  • O99.31|

    Alcohol use complicating pregnancy, childbirth, and the puerperium

  • O99.310|

    Alcohol use complicating pregnancy, unspecified trimester

  • O99.311|

    Alcohol use complicating pregnancy, first trimester

  • O99.312|

    Alcohol use complicating pregnancy, second trimester

  • O99.313|

    Alcohol use complicating pregnancy, third trimester

  • O99.314|

    Alcohol use complicating childbirth

  • O99.315|

    Alcohol use complicating the puerperium

  • O99.32|

    Drug use complicating pregnancy, childbirth, and the puerperium

  • O99.320|

    Drug use complicating pregnancy, unspecified trimester

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