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O40.1

⚠ Non-billable (Header)

Polyhydramnios, first trimester

Pregnancy, childbirth and the puerperium (O00-O9A)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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❌ Excludes1

inherited from O40

Rules from parent category O40: Polyhydramnios

  • • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)

Child Codes (7)

O40.1XX0Polyhydramnios, first trimester, not applicable or unspecifiedO40.1XX1Polyhydramnios, first trimester, fetus 1O40.1XX2Polyhydramnios, first trimester, fetus 2O40.1XX3Polyhydramnios, first trimester, fetus 3O40.1XX4Polyhydramnios, first trimester, fetus 4O40.1XX5Polyhydramnios, first trimester, fetus 5O40.1XX9Polyhydramnios, first trimester, other fetus

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Code Information

CodeO40.1
BillableNo — Header code
ParentO40
CategoryPregnancy, childbirth and the puerperium (O00-O9A)
Excludes11 rule(s)
Excludes20 note(s)
Child codes7

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)