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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