O40.3
⚠ Non-billable (Header)Polyhydramnios, third trimester
Pregnancy, childbirth and the puerperium (O00-O9A)
⚠️ This is a category header code — not billable. Use a more specific child code below.
❌ Excludes1
inherited from O40Rules from parent category O40: Polyhydramnios
- • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
Child Codes (7)
O40.3XX0Polyhydramnios, third trimester, not applicable or unspecifiedO40.3XX1Polyhydramnios, third trimester, fetus 1O40.3XX2Polyhydramnios, third trimester, fetus 2O40.3XX3Polyhydramnios, third trimester, fetus 3O40.3XX4Polyhydramnios, third trimester, fetus 4O40.3XX5Polyhydramnios, third trimester, fetus 5O40.3XX9Polyhydramnios, third trimester, other fetus
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CodeO40.3
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)