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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