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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  • O14.20|

    HELLP syndrome (HELLP), unspecified trimester

  • O14.22|

    HELLP syndrome (HELLP), second trimester

  • O14.23|

    HELLP syndrome (HELLP), third trimester

  • O14.24|

    HELLP syndrome, complicating childbirth

  • O14.25|

    HELLP syndrome, complicating the puerperium

  • O14.9|

    Unspecified pre-eclampsia

  • O14.90|

    Unspecified pre-eclampsia, unspecified trimester

  • O14.92|

    Unspecified pre-eclampsia, second trimester

  • O14.93|

    Unspecified pre-eclampsia, third trimester

  • O14.94|

    Unspecified pre-eclampsia, complicating childbirth

  • O14.95|

    Unspecified pre-eclampsia, complicating the puerperium

  • O15|

    Eclampsia

  • O15.0|

    Eclampsia complicating pregnancy

  • O15.00|

    Eclampsia complicating pregnancy, unspecified trimester

  • O15.02|

    Eclampsia complicating pregnancy, second trimester

  • O15.03|

    Eclampsia complicating pregnancy, third trimester

  • O15.1|

    Eclampsia complicating labor

  • O15.2|

    Eclampsia complicating the puerperium

  • O15.9|

    Eclampsia, unspecified as to time period

  • O16|

    Unspecified maternal hypertension

  • 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|

    Hemorrhage in early pregnancy

  • O20.0|

    Threatened abortion

  • O20.8|

    Other hemorrhage in early pregnancy

  • O20.9|

    Hemorrhage in early pregnancy, unspecified

  • O21|

    Excessive vomiting in pregnancy

  • 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|

    Venous complications and hemorrhoids in pregnancy

  • O22.0|

    Varicose veins of lower extremity in pregnancy

  • 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

  • O22.1|

    Genital varices in pregnancy

  • 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

  • O22.2|

    Superficial thrombophlebitis in pregnancy

  • O22.20|

    Superficial thrombophlebitis in pregnancy, unspecified trimester

  • O22.21|

    Superficial thrombophlebitis in pregnancy, first trimester

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