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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  • O16.1—

    Unspecified maternal hypertension, first trimester

  • O16.2—

    Unspecified maternal hypertension, second trimester

  • O16.3—

    Unspecified maternal hypertension, third trimester

  • O16.4—

    Unspecified maternal hypertension, complicating childbirth

  • O16.5—

    Unspecified maternal hypertension, complicating the puerperium

  • O16.9—

    Unspecified maternal hypertension, unspecified trimester

  • O20.0—

    Threatened abortion

  • O20.8—

    Other hemorrhage in early pregnancy

  • O20.9—

    Hemorrhage in early pregnancy, unspecified

  • O21.0—

    Mild hyperemesis gravidarum

  • O21.1—

    Hyperemesis gravidarum with metabolic disturbance

  • O21.2—

    Late vomiting of pregnancy

  • O21.8—

    Other vomiting complicating pregnancy

  • O21.9—

    Vomiting of pregnancy, unspecified

  • O22.00—

    Varicose veins of lower extremity in pregnancy, unspecified trimester

  • O22.01—

    Varicose veins of lower extremity in pregnancy, first trimester

  • O22.02—

    Varicose veins of lower extremity in pregnancy, second trimester

  • O22.03—

    Varicose veins of lower extremity in pregnancy, third trimester

  • O22.10—

    Genital varices in pregnancy, unspecified trimester

  • O22.11—

    Genital varices in pregnancy, first trimester

  • O22.12—

    Genital varices in pregnancy, second trimester

  • O22.13—

    Genital varices in pregnancy, third trimester

  • O22.20—

    Superficial thrombophlebitis in pregnancy, unspecified trimester

  • O22.21—

    Superficial thrombophlebitis in pregnancy, first trimester

  • O22.22—

    Superficial thrombophlebitis in pregnancy, second trimester

  • O22.23—

    Superficial thrombophlebitis in pregnancy, third trimester

  • O22.30—

    Deep phlebothrombosis in pregnancy, unspecified trimester

  • O22.31—

    Deep phlebothrombosis in pregnancy, first trimester

  • O22.32—

    Deep phlebothrombosis in pregnancy, second trimester

  • O22.33—

    Deep phlebothrombosis in pregnancy, third trimester

  • O22.40—

    Hemorrhoids in pregnancy, unspecified trimester

  • O22.41—

    Hemorrhoids in pregnancy, first trimester

  • O22.42—

    Hemorrhoids in pregnancy, second trimester

  • O22.43—

    Hemorrhoids in pregnancy, third trimester

  • O22.50—

    Cerebral venous thrombosis in pregnancy, unspecified trimester

  • O22.51—

    Cerebral venous thrombosis in pregnancy, first trimester

  • O22.52—

    Cerebral venous thrombosis in pregnancy, second trimester

  • O22.53—

    Cerebral venous thrombosis in pregnancy, third trimester

  • O22.8X1—

    Other venous complications in pregnancy, first trimester

  • O22.8X2—

    Other venous complications in pregnancy, second trimester

  • O22.8X3—

    Other venous complications in pregnancy, third trimester

  • O22.8X9—

    Other venous complications in pregnancy, unspecified trimester

  • O22.90—

    Venous complication in pregnancy, unspecified, unspecified trimester

  • O22.91—

    Venous complication in pregnancy, unspecified, first trimester

  • O22.92—

    Venous complication in pregnancy, unspecified, second trimester

  • O22.93—

    Venous complication in pregnancy, unspecified, third trimester

  • O23.00—

    Infections of kidney in pregnancy, unspecified trimester

  • O23.01—

    Infections of kidney in pregnancy, first trimester

  • O23.02—

    Infections of kidney in pregnancy, second trimester

  • O23.03—

    Infections of kidney in pregnancy, third trimester

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