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
  • O36.1199

    Maternal care for Anti-A sensitization, unspecified trimester, other fetus

  • O36.19

    Maternal care for other isoimmunization

  • O36.191

    Maternal care for other isoimmunization, first trimester

  • O36.1910

    Maternal care for other isoimmunization, first trimester, not applicable or unspecified

  • O36.1911

    Maternal care for other isoimmunization, first trimester, fetus 1

  • O36.1912

    Maternal care for other isoimmunization, first trimester, fetus 2

  • O36.1913

    Maternal care for other isoimmunization, first trimester, fetus 3

  • O36.1914

    Maternal care for other isoimmunization, first trimester, fetus 4

  • O36.1915

    Maternal care for other isoimmunization, first trimester, fetus 5

  • O36.1919

    Maternal care for other isoimmunization, first trimester, other fetus

  • O36.192

    Maternal care for other isoimmunization, second trimester

  • O36.1920

    Maternal care for other isoimmunization, second trimester, not applicable or unspecified

  • O36.1921

    Maternal care for other isoimmunization, second trimester, fetus 1

  • O36.1922

    Maternal care for other isoimmunization, second trimester, fetus 2

  • O36.1923

    Maternal care for other isoimmunization, second trimester, fetus 3

  • O36.1924

    Maternal care for other isoimmunization, second trimester, fetus 4

  • O36.1925

    Maternal care for other isoimmunization, second trimester, fetus 5

  • O36.1929

    Maternal care for other isoimmunization, second trimester, other fetus

  • O36.193

    Maternal care for other isoimmunization, third trimester

  • O36.1930

    Maternal care for other isoimmunization, third trimester, not applicable or unspecified

  • O36.1931

    Maternal care for other isoimmunization, third trimester, fetus 1

  • O36.1932

    Maternal care for other isoimmunization, third trimester, fetus 2

  • O36.1933

    Maternal care for other isoimmunization, third trimester, fetus 3

  • O36.1934

    Maternal care for other isoimmunization, third trimester, fetus 4

  • O36.1935

    Maternal care for other isoimmunization, third trimester, fetus 5

  • O36.1939

    Maternal care for other isoimmunization, third trimester, other fetus

  • O36.199

    Maternal care for other isoimmunization, unspecified trimester

  • O36.1990

    Maternal care for other isoimmunization, unspecified trimester, not applicable or unspecified

  • O36.1991

    Maternal care for other isoimmunization, unspecified trimester, fetus 1

  • O36.1992

    Maternal care for other isoimmunization, unspecified trimester, fetus 2

  • O36.1993

    Maternal care for other isoimmunization, unspecified trimester, fetus 3

  • O36.1994

    Maternal care for other isoimmunization, unspecified trimester, fetus 4

  • O36.1995

    Maternal care for other isoimmunization, unspecified trimester, fetus 5

  • O36.1999

    Maternal care for other isoimmunization, unspecified trimester, other fetus

  • O36.2

    Maternal care for hydrops fetalis

  • O36.20

    Maternal care for hydrops fetalis, unspecified trimester

  • O36.20X0

    Maternal care for hydrops fetalis, unspecified trimester, not applicable or unspecified

  • O36.20X1

    Maternal care for hydrops fetalis, unspecified trimester, fetus 1

  • O36.20X2

    Maternal care for hydrops fetalis, unspecified trimester, fetus 2

  • O36.20X3

    Maternal care for hydrops fetalis, unspecified trimester, fetus 3

  • O36.20X4

    Maternal care for hydrops fetalis, unspecified trimester, fetus 4

  • O36.20X5

    Maternal care for hydrops fetalis, unspecified trimester, fetus 5

  • O36.20X9

    Maternal care for hydrops fetalis, unspecified trimester, other fetus

  • O36.21

    Maternal care for hydrops fetalis, first trimester

  • O36.21X0

    Maternal care for hydrops fetalis, first trimester, not applicable or unspecified

  • O36.21X1

    Maternal care for hydrops fetalis, first trimester, fetus 1

  • O36.21X2

    Maternal care for hydrops fetalis, first trimester, fetus 2

  • O36.21X3

    Maternal care for hydrops fetalis, first trimester, fetus 3

  • O36.21X4

    Maternal care for hydrops fetalis, first trimester, fetus 4

  • O36.21X5

    Maternal care for hydrops fetalis, first trimester, fetus 5

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