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.
Internal Codes
  • O26.50

    Maternal hypotension syndrome, unspecified trimester

  • O26.51

    Maternal hypotension syndrome, first trimester

  • O26.52

    Maternal hypotension syndrome, second trimester

  • O26.53

    Maternal hypotension syndrome, third trimester

  • O26.611

    Liver and biliary tract disorders in pregnancy, first trimester

  • O26.612

    Liver and biliary tract disorders in pregnancy, second trimester

  • O26.613

    Liver and biliary tract disorders in pregnancy, third trimester

  • O26.619

    Liver and biliary tract disorders in pregnancy, unspecified trimester

  • O26.62

    Liver and biliary tract disorders in childbirth

  • O26.63

    Liver and biliary tract disorders in the puerperium

  • O26.641

    Intrahepatic cholestasis of pregnancy, first trimester

  • O26.642

    Intrahepatic cholestasis of pregnancy, second trimester

  • O26.643

    Intrahepatic cholestasis of pregnancy, third trimester

  • O26.649

    Intrahepatic cholestasis of pregnancy, unspecified trimester

  • O26.711

    Subluxation of symphysis (pubis) in pregnancy, first trimester

  • O26.712

    Subluxation of symphysis (pubis) in pregnancy, second trimester

  • O26.713

    Subluxation of symphysis (pubis) in pregnancy, third trimester

  • O26.719

    Subluxation of symphysis (pubis) in pregnancy, unspecified trimester

  • O26.72

    Subluxation of symphysis (pubis) in childbirth

  • O26.73

    Subluxation of symphysis (pubis) in the puerperium

  • O26.811

    Pregnancy related exhaustion and fatigue, first trimester

  • O26.812

    Pregnancy related exhaustion and fatigue, second trimester

  • O26.813

    Pregnancy related exhaustion and fatigue, third trimester

  • O26.819

    Pregnancy related exhaustion and fatigue, unspecified trimester

  • O26.821

    Pregnancy related peripheral neuritis, first trimester

  • O26.822

    Pregnancy related peripheral neuritis, second trimester

  • O26.823

    Pregnancy related peripheral neuritis, third trimester

  • O26.829

    Pregnancy related peripheral neuritis, unspecified trimester

  • O26.831

    Pregnancy related renal disease, first trimester

  • O26.832

    Pregnancy related renal disease, second trimester

  • O26.833

    Pregnancy related renal disease, third trimester

  • O26.839

    Pregnancy related renal disease, unspecified trimester

  • O26.841

    Uterine size-date discrepancy, first trimester

  • O26.842

    Uterine size-date discrepancy, second trimester

  • O26.843

    Uterine size-date discrepancy, third trimester

  • O26.849

    Uterine size-date discrepancy, unspecified trimester

  • O26.851

    Spotting complicating pregnancy, first trimester

  • O26.852

    Spotting complicating pregnancy, second trimester

  • O26.853

    Spotting complicating pregnancy, third trimester

  • O26.859

    Spotting complicating pregnancy, unspecified trimester

  • O26.86

    Pruritic urticarial papules and plaques of pregnancy (PUPPP)

  • O26.872

    Cervical shortening, second trimester

  • O26.873

    Cervical shortening, third trimester

  • O26.879

    Cervical shortening, unspecified trimester

  • O26.891

    Other specified pregnancy related conditions, first trimester

  • O26.892

    Other specified pregnancy related conditions, second trimester

  • O26.893

    Other specified pregnancy related conditions, third trimester

  • O26.899

    Other specified pregnancy related conditions, unspecified trimester

  • O26.90

    Pregnancy related conditions, unspecified, unspecified trimester

  • O26.91

    Pregnancy related conditions, unspecified, first trimester

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