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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  • O09.90|

    Supervision of high risk pregnancy, unspecified, unspecified trimester

  • O09.91|

    Supervision of high risk pregnancy, unspecified, first trimester

  • O09.92|

    Supervision of high risk pregnancy, unspecified, second trimester

  • O09.93|

    Supervision of high risk pregnancy, unspecified, third trimester

  • O09.A0|

    Supervision of pregnancy with history of molar pregnancy, unspecified trimester

  • O09.A1|

    Supervision of pregnancy with history of molar pregnancy, first trimester

  • O09.A2|

    Supervision of pregnancy with history of molar pregnancy, second trimester

  • O09.A3|

    Supervision of pregnancy with history of molar pregnancy, third trimester

  • O10.011|

    Pre-existing essential hypertension complicating pregnancy, first trimester

  • O10.012|

    Pre-existing essential hypertension complicating pregnancy, second trimester

  • O10.013|

    Pre-existing essential hypertension complicating pregnancy, third trimester

  • O10.019|

    Pre-existing essential hypertension complicating pregnancy, unspecified trimester

  • O10.02|

    Pre-existing essential hypertension complicating childbirth

  • O10.03|

    Pre-existing essential hypertension complicating the puerperium

  • O10.111|

    Pre-existing hypertensive heart disease complicating pregnancy, first trimester

  • O10.112|

    Pre-existing hypertensive heart disease complicating pregnancy, second trimester

  • O10.113|

    Pre-existing hypertensive heart disease complicating pregnancy, third trimester

  • O10.119|

    Pre-existing hypertensive heart disease complicating pregnancy, unspecified trimester

  • O10.12|

    Pre-existing hypertensive heart disease complicating childbirth

  • O10.13|

    Pre-existing hypertensive heart disease complicating the puerperium

  • O10.211|

    Pre-existing hypertensive chronic kidney disease complicating pregnancy, first trimester

  • O10.212|

    Pre-existing hypertensive chronic kidney disease complicating pregnancy, second trimester

  • O10.213|

    Pre-existing hypertensive chronic kidney disease complicating pregnancy, third trimester

  • O10.219|

    Pre-existing hypertensive chronic kidney disease complicating pregnancy, unspecified trimester

  • O10.22|

    Pre-existing hypertensive chronic kidney disease complicating childbirth

  • O10.23|

    Pre-existing hypertensive chronic kidney disease complicating the puerperium

  • O10.311|

    Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, first trimester

  • O10.312|

    Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, second trimester

  • O10.313|

    Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, third trimester

  • O10.319|

    Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, unspecified trimester

  • O10.32|

    Pre-existing hypertensive heart and chronic kidney disease complicating childbirth

  • O10.33|

    Pre-existing hypertensive heart and chronic kidney disease complicating the puerperium

  • O10.411|

    Pre-existing secondary hypertension complicating pregnancy, first trimester

  • O10.412|

    Pre-existing secondary hypertension complicating pregnancy, second trimester

  • O10.413|

    Pre-existing secondary hypertension complicating pregnancy, third trimester

  • O10.419|

    Pre-existing secondary hypertension complicating pregnancy, unspecified trimester

  • O10.42|

    Pre-existing secondary hypertension complicating childbirth

  • O10.43|

    Pre-existing secondary hypertension complicating the puerperium

  • O10.911|

    Unspecified pre-existing hypertension complicating pregnancy, first trimester

  • O10.912|

    Unspecified pre-existing hypertension complicating pregnancy, second trimester

  • O10.913|

    Unspecified pre-existing hypertension complicating pregnancy, third trimester

  • O10.919|

    Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester

  • O10.92|

    Unspecified pre-existing hypertension complicating childbirth

  • O10.93|

    Unspecified pre-existing hypertension complicating the puerperium

  • 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

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