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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  • O99.211—

    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

  • O99.280—

    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

  • O99.310—

    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

  • O99.320—

    Drug use complicating pregnancy, unspecified trimester

  • 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

  • O99.330—

    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

  • O99.340—

    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

  • O99.350—

    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

  • O99.411—

    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

  • O99.511—

    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

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