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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  • O40.1XX2—

    Polyhydramnios, first trimester, fetus 2

  • O40.1XX3—

    Polyhydramnios, first trimester, fetus 3

  • O40.1XX4—

    Polyhydramnios, first trimester, fetus 4

  • O40.1XX5—

    Polyhydramnios, first trimester, fetus 5

  • O40.1XX9—

    Polyhydramnios, first trimester, other fetus

  • O40.2—

    Polyhydramnios, second trimester

  • O40.2XX0—

    Polyhydramnios, second trimester, not applicable or unspecified

  • O40.2XX1—

    Polyhydramnios, second trimester, fetus 1

  • O40.2XX2—

    Polyhydramnios, second trimester, fetus 2

  • O40.2XX3—

    Polyhydramnios, second trimester, fetus 3

  • O40.2XX4—

    Polyhydramnios, second trimester, fetus 4

  • O40.2XX5—

    Polyhydramnios, second trimester, fetus 5

  • O40.2XX9—

    Polyhydramnios, second trimester, other fetus

  • O40.3—

    Polyhydramnios, third trimester

  • O40.3XX0—

    Polyhydramnios, third trimester, not applicable or unspecified

  • O40.3XX1—

    Polyhydramnios, third trimester, fetus 1

  • O40.3XX2—

    Polyhydramnios, third trimester, fetus 2

  • O40.3XX3—

    Polyhydramnios, third trimester, fetus 3

  • O40.3XX4—

    Polyhydramnios, third trimester, fetus 4

  • O40.3XX5—

    Polyhydramnios, third trimester, fetus 5

  • O40.3XX9—

    Polyhydramnios, third trimester, other fetus

  • O40.9—

    Polyhydramnios, unspecified trimester

  • O40.9XX0—

    Polyhydramnios, unspecified trimester, not applicable or unspecified

  • O40.9XX1—

    Polyhydramnios, unspecified trimester, fetus 1

  • O40.9XX2—

    Polyhydramnios, unspecified trimester, fetus 2

  • O40.9XX3—

    Polyhydramnios, unspecified trimester, fetus 3

  • O40.9XX4—

    Polyhydramnios, unspecified trimester, fetus 4

  • O40.9XX5—

    Polyhydramnios, unspecified trimester, fetus 5

  • O40.9XX9—

    Polyhydramnios, unspecified trimester, other fetus

  • O41.00—

    Oligohydramnios, unspecified trimester

  • O41.00X0—

    Oligohydramnios, unspecified trimester, not applicable or unspecified

  • O41.00X1—

    Oligohydramnios, unspecified trimester, fetus 1

  • O41.00X2—

    Oligohydramnios, unspecified trimester, fetus 2

  • O41.00X3—

    Oligohydramnios, unspecified trimester, fetus 3

  • O41.00X4—

    Oligohydramnios, unspecified trimester, fetus 4

  • O41.00X5—

    Oligohydramnios, unspecified trimester, fetus 5

  • O41.00X9—

    Oligohydramnios, unspecified trimester, other fetus

  • O41.01—

    Oligohydramnios, first trimester

  • O41.01X0—

    Oligohydramnios, first trimester, not applicable or unspecified

  • O41.01X1—

    Oligohydramnios, first trimester, fetus 1

  • O41.01X2—

    Oligohydramnios, first trimester, fetus 2

  • O41.01X3—

    Oligohydramnios, first trimester, fetus 3

  • O41.01X4—

    Oligohydramnios, first trimester, fetus 4

  • O41.01X5—

    Oligohydramnios, first trimester, fetus 5

  • O41.01X9—

    Oligohydramnios, first trimester, other fetus

  • O41.02—

    Oligohydramnios, second trimester

  • O41.02X0—

    Oligohydramnios, second trimester, not applicable or unspecified

  • O41.02X1—

    Oligohydramnios, second trimester, fetus 1

  • O41.02X2—

    Oligohydramnios, second trimester, fetus 2

  • O41.02X3—

    Oligohydramnios, second trimester, fetus 3

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