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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