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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  • O11—

    Pre-existing hypertension with pre-eclampsia

  • O11.1—

    Pre-existing hypertension with pre-eclampsia, first trimester

  • O11.2—

    Pre-existing hypertension with pre-eclampsia, second trimester

  • O11.3—

    Pre-existing hypertension with pre-eclampsia, third trimester

  • O11.4—

    Pre-existing hypertension with pre-eclampsia, complicating childbirth

  • O11.5—

    Pre-existing hypertension with pre-eclampsia, complicating the puerperium

  • O11.9—

    Pre-existing hypertension with pre-eclampsia, unspecified trimester

  • O12—

    Gestational [pregnancy-induced] edema and proteinuria without hypertension

  • O12.0—

    Gestational edema

  • O12.00—

    Gestational edema, unspecified trimester

  • O12.01—

    Gestational edema, first trimester

  • O12.02—

    Gestational edema, second trimester

  • O12.03—

    Gestational edema, third trimester

  • O12.04—

    Gestational edema, complicating childbirth

  • O12.05—

    Gestational edema, complicating the puerperium

  • O12.1—

    Gestational proteinuria

  • O12.10—

    Gestational proteinuria, unspecified trimester

  • O12.11—

    Gestational proteinuria, first trimester

  • O12.12—

    Gestational proteinuria, second trimester

  • O12.13—

    Gestational proteinuria, third trimester

  • O12.14—

    Gestational proteinuria, complicating childbirth

  • O12.15—

    Gestational proteinuria, complicating the puerperium

  • O12.2—

    Gestational edema with proteinuria

  • O12.20—

    Gestational edema with proteinuria, unspecified trimester

  • O12.21—

    Gestational edema with proteinuria, first trimester

  • O12.22—

    Gestational edema with proteinuria, second trimester

  • O12.23—

    Gestational edema with proteinuria, third trimester

  • O12.24—

    Gestational edema with proteinuria, complicating childbirth

  • O12.25—

    Gestational edema with proteinuria, complicating the puerperium

  • O13—

    Gestational [pregnancy-induced] hypertension without significant proteinuria

  • O13.1—

    Gestational [pregnancy-induced] hypertension without significant proteinuria, first trimester

  • O13.2—

    Gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester

  • O13.3—

    Gestational [pregnancy-induced] hypertension without significant proteinuria, third trimester

  • O13.4—

    Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating childbirth

  • O13.5—

    Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating the puerperium

  • O13.9—

    Gestational [pregnancy-induced] hypertension without significant proteinuria, unspecified trimester

  • O14—

    Pre-eclampsia

  • O14.0—

    Mild to moderate pre-eclampsia

  • O14.00—

    Mild to moderate pre-eclampsia, unspecified trimester

  • O14.02—

    Mild to moderate pre-eclampsia, second trimester

  • O14.03—

    Mild to moderate pre-eclampsia, third trimester

  • O14.04—

    Mild to moderate pre-eclampsia, complicating childbirth

  • O14.05—

    Mild to moderate pre-eclampsia, complicating the puerperium

  • O14.1—

    Severe pre-eclampsia

  • O14.10—

    Severe pre-eclampsia, unspecified trimester

  • O14.12—

    Severe pre-eclampsia, second trimester

  • O14.13—

    Severe pre-eclampsia, third trimester

  • O14.14—

    Severe pre-eclampsia complicating childbirth

  • O14.15—

    Severe pre-eclampsia, complicating the puerperium

  • O14.2—

    HELLP syndrome

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