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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  • O89.01—

    Aspiration pneumonitis due to anesthesia during the puerperium

  • O89.09—

    Other pulmonary complications of anesthesia during the puerperium

  • O89.1—

    Cardiac complications of anesthesia during the puerperium

  • O89.2—

    Central nervous system complications of anesthesia during the puerperium

  • O89.3—

    Toxic reaction to local anesthesia during the puerperium

  • O89.4—

    Spinal and epidural anesthesia-induced headache during the puerperium

  • O89.5—

    Other complications of spinal and epidural anesthesia during the puerperium

  • O89.6—

    Failed or difficult intubation for anesthesia during the puerperium

  • O89.8—

    Other complications of anesthesia during the puerperium

  • O89.9—

    Complication of anesthesia during the puerperium, unspecified

  • O90—

    Complications of the puerperium, not elsewhere classified

  • O90.0—

    Disruption of cesarean delivery wound

  • O90.1—

    Disruption of perineal obstetric wound

  • O90.2—

    Hematoma of obstetric wound

  • O90.3—

    Peripartum cardiomyopathy

  • O90.4—

    Postpartum acute kidney failure

  • O90.41—

    Hepatorenal syndrome following labor and delivery

  • O90.49—

    Other postpartum acute kidney failure

  • O90.5—

    Postpartum thyroiditis

  • O90.6—

    Postpartum mood disturbance

  • O90.8—

    Other complications of the puerperium, not elsewhere classified

  • O90.81—

    Anemia of the puerperium

  • O90.89—

    Other complications of the puerperium, not elsewhere classified

  • O90.9—

    Complication of the puerperium, unspecified

  • O91—

    Infections of breast associated with pregnancy, the puerperium and lactation

  • O91.0—

    Infection of nipple associated with pregnancy, the puerperium and lactation

  • O91.01—

    Infection of nipple associated with pregnancy

  • O91.011—

    Infection of nipple associated with pregnancy, first trimester

  • O91.012—

    Infection of nipple associated with pregnancy, second trimester

  • O91.013—

    Infection of nipple associated with pregnancy, third trimester

  • O91.019—

    Infection of nipple associated with pregnancy, unspecified trimester

  • O91.02—

    Infection of nipple associated with the puerperium

  • O91.03—

    Infection of nipple associated with lactation

  • O91.1—

    Abscess of breast associated with pregnancy, the puerperium and lactation

  • O91.11—

    Abscess of breast associated with pregnancy

  • O91.111—

    Abscess of breast associated with pregnancy, first trimester

  • O91.112—

    Abscess of breast associated with pregnancy, second trimester

  • O91.113—

    Abscess of breast associated with pregnancy, third trimester

  • O91.119—

    Abscess of breast associated with pregnancy, unspecified trimester

  • O91.12—

    Abscess of breast associated with the puerperium

  • O91.13—

    Abscess of breast associated with lactation

  • O91.2—

    Nonpurulent mastitis associated with pregnancy, the puerperium and lactation

  • O91.21—

    Nonpurulent mastitis associated with pregnancy

  • O91.211—

    Nonpurulent mastitis associated with pregnancy, first trimester

  • O91.212—

    Nonpurulent mastitis associated with pregnancy, second trimester

  • O91.213—

    Nonpurulent mastitis associated with pregnancy, third trimester

  • O91.219—

    Nonpurulent mastitis associated with pregnancy, unspecified trimester

  • O91.22—

    Nonpurulent mastitis associated with the puerperium

  • O91.23—

    Nonpurulent mastitis associated with lactation

  • O92—

    Other disorders of breast and disorders of lactation associated with pregnancy and the puerperium

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