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)
  • supervision of normal pregnancy (Z34.-)
Excludes2(Not included here)
  • 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
Browse by Section9 Sections
Internal Codes
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  • O00—

    Ectopic pregnancy

  • O00.0—

    Abdominal pregnancy

  • O00.00—

    Abdominal pregnancy without intrauterine pregnancy

  • O00.01—

    Abdominal pregnancy with intrauterine pregnancy

  • O00.1—

    Tubal pregnancy

  • O00.10—

    Tubal pregnancy without intrauterine pregnancy

  • O00.101—

    Right tubal pregnancy without intrauterine pregnancy

  • O00.102—

    Left tubal pregnancy without intrauterine pregnancy

  • O00.109—

    Unspecified tubal pregnancy without intrauterine pregnancy

  • O00.11—

    Tubal pregnancy with intrauterine pregnancy

  • O00.111—

    Right tubal pregnancy with intrauterine pregnancy

  • O00.112—

    Left tubal pregnancy with intrauterine pregnancy

  • O00.119—

    Unspecified tubal pregnancy with intrauterine pregnancy

  • O00.2—

    Ovarian pregnancy

  • O00.20—

    Ovarian pregnancy without intrauterine pregnancy

  • O00.201—

    Right ovarian pregnancy without intrauterine pregnancy

  • O00.202—

    Left ovarian pregnancy without intrauterine pregnancy

  • O00.209—

    Unspecified ovarian pregnancy without intrauterine pregnancy

  • O00.21—

    Ovarian pregnancy with intrauterine pregnancy

  • O00.211—

    Right ovarian pregnancy with intrauterine pregnancy

  • O00.212—

    Left ovarian pregnancy with intrauterine pregnancy

  • O00.219—

    Unspecified ovarian pregnancy with intrauterine pregnancy

  • O00.8—

    Other ectopic pregnancy

  • O00.80—

    Other ectopic pregnancy without intrauterine pregnancy

  • O00.81—

    Other ectopic pregnancy with intrauterine pregnancy

  • O00.9—

    Ectopic pregnancy, unspecified

  • O00.90—

    Unspecified ectopic pregnancy without intrauterine pregnancy

  • O00.91—

    Unspecified ectopic pregnancy with intrauterine pregnancy

  • O01—

    Hydatidiform mole

  • O01.0—

    Classical hydatidiform mole

  • O01.1—

    Incomplete and partial hydatidiform mole

  • O01.9—

    Hydatidiform mole, unspecified

  • O02—

    Other abnormal products of conception

  • O02.0—

    Blighted ovum and nonhydatidiform mole

  • O02.1—

    Missed abortion

  • O02.8—

    Other specified abnormal products of conception

  • O02.81—

    Inappropriate change in quantitative human chorionic gonadotropin (hCG) in early pregnancy

  • O02.89—

    Other abnormal products of conception

  • O02.9—

    Abnormal product of conception, unspecified

  • O03—

    Spontaneous abortion

  • O03.0—

    Genital tract and pelvic infection following incomplete spontaneous abortion

  • O03.1—

    Delayed or excessive hemorrhage following incomplete spontaneous abortion

  • O03.2—

    Embolism following incomplete spontaneous abortion

  • O03.3—

    Other and unspecified complications following incomplete spontaneous abortion

  • O03.30—

    Unspecified complication following incomplete spontaneous abortion

  • O03.31—

    Shock following incomplete spontaneous abortion

  • O03.32—

    Renal failure following incomplete spontaneous abortion

  • O03.33—

    Metabolic disorder following incomplete spontaneous abortion

  • O03.34—

    Damage to pelvic organs following incomplete spontaneous abortion

  • O03.35—

    Other venous complications following incomplete spontaneous abortion

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