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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  • O99.321|

    Drug use complicating pregnancy, first trimester

  • O99.322|

    Drug use complicating pregnancy, second trimester

  • O99.323|

    Drug use complicating pregnancy, third trimester

  • O99.324|

    Drug use complicating childbirth

  • O99.325|

    Drug use complicating the puerperium

  • O99.33|

    Tobacco use disorder complicating pregnancy, childbirth, and the puerperium

  • O99.330|

    Smoking (tobacco) complicating pregnancy, unspecified trimester

  • O99.331|

    Smoking (tobacco) complicating pregnancy, first trimester

  • O99.332|

    Smoking (tobacco) complicating pregnancy, second trimester

  • O99.333|

    Smoking (tobacco) complicating pregnancy, third trimester

  • O99.334|

    Smoking (tobacco) complicating childbirth

  • O99.335|

    Smoking (tobacco) complicating the puerperium

  • O99.34|

    Other mental disorders complicating pregnancy, childbirth, and the puerperium

  • O99.340|

    Other mental disorders complicating pregnancy, unspecified trimester

  • O99.341|

    Other mental disorders complicating pregnancy, first trimester

  • O99.342|

    Other mental disorders complicating pregnancy, second trimester

  • O99.343|

    Other mental disorders complicating pregnancy, third trimester

  • O99.344|

    Other mental disorders complicating childbirth

  • O99.345|

    Other mental disorders complicating the puerperium

  • O99.35|

    Diseases of the nervous system complicating pregnancy, childbirth, and the puerperium

  • O99.350|

    Diseases of the nervous system complicating pregnancy, unspecified trimester

  • O99.351|

    Diseases of the nervous system complicating pregnancy, first trimester

  • O99.352|

    Diseases of the nervous system complicating pregnancy, second trimester

  • O99.353|

    Diseases of the nervous system complicating pregnancy, third trimester

  • O99.354|

    Diseases of the nervous system complicating childbirth

  • O99.355|

    Diseases of the nervous system complicating the puerperium

  • O99.4|

    Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium

  • O99.41|

    Diseases of the circulatory system complicating pregnancy

  • O99.411|

    Diseases of the circulatory system complicating pregnancy, first trimester

  • O99.412|

    Diseases of the circulatory system complicating pregnancy, second trimester

  • O99.413|

    Diseases of the circulatory system complicating pregnancy, third trimester

  • O99.419|

    Diseases of the circulatory system complicating pregnancy, unspecified trimester

  • O99.42|

    Diseases of the circulatory system complicating childbirth

  • O99.43|

    Diseases of the circulatory system complicating the puerperium

  • O99.5|

    Diseases of the respiratory system complicating pregnancy, childbirth and the puerperium

  • O99.51|

    Diseases of the respiratory system complicating pregnancy

  • O99.511|

    Diseases of the respiratory system complicating pregnancy, first trimester

  • O99.512|

    Diseases of the respiratory system complicating pregnancy, second trimester

  • O99.513|

    Diseases of the respiratory system complicating pregnancy, third trimester

  • O99.519|

    Diseases of the respiratory system complicating pregnancy, unspecified trimester

  • O99.52|

    Diseases of the respiratory system complicating childbirth

  • O99.53|

    Diseases of the respiratory system complicating the puerperium

  • O99.6|

    Diseases of the digestive system complicating pregnancy, childbirth and the puerperium

  • O99.61|

    Diseases of the digestive system complicating pregnancy

  • O99.611|

    Diseases of the digestive system complicating pregnancy, first trimester

  • O99.612|

    Diseases of the digestive system complicating pregnancy, second trimester

  • O99.613|

    Diseases of the digestive system complicating pregnancy, third trimester

  • O99.619|

    Diseases of the digestive system complicating pregnancy, unspecified trimester

  • O99.62|

    Diseases of the digestive system complicating childbirth

  • O99.63|

    Diseases of the digestive system complicating the puerperium

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