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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