Back to ICD-10 library
ICD-10-CM · FY 2026 APRIL UPDATE

O40

Polyhydramnios

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
O40.1Polyhydramnios, first trimesterCategory
O40.1XX0Polyhydramnios, first trimester, not applicable or unspecifiedBillable
O40.1XX1Polyhydramnios, first trimester, fetus 1Billable
O40.1XX2Polyhydramnios, first trimester, fetus 2Billable
O40.1XX3Polyhydramnios, first trimester, fetus 3Billable
O40.1XX4Polyhydramnios, first trimester, fetus 4Billable
O40.1XX5Polyhydramnios, first trimester, fetus 5Billable
O40.1XX9Polyhydramnios, first trimester, other fetusBillable
O40.2Polyhydramnios, second trimesterCategory
O40.2XX0Polyhydramnios, second trimester, not applicable or unspecifiedBillable
O40.2XX1Polyhydramnios, second trimester, fetus 1Billable
O40.2XX2Polyhydramnios, second trimester, fetus 2Billable
O40.2XX3Polyhydramnios, second trimester, fetus 3Billable
O40.2XX4Polyhydramnios, second trimester, fetus 4Billable
O40.2XX5Polyhydramnios, second trimester, fetus 5Billable
O40.2XX9Polyhydramnios, second trimester, other fetusBillable
O40.3Polyhydramnios, third trimesterCategory
O40.3XX0Polyhydramnios, third trimester, not applicable or unspecifiedBillable
O40.3XX1Polyhydramnios, third trimester, fetus 1Billable
O40.3XX2Polyhydramnios, third trimester, fetus 2Billable
O40.3XX3Polyhydramnios, third trimester, fetus 3Billable
O40.3XX4Polyhydramnios, third trimester, fetus 4Billable
O40.3XX5Polyhydramnios, third trimester, fetus 5Billable
O40.3XX9Polyhydramnios, third trimester, other fetusBillable
O40.9Polyhydramnios, unspecified trimesterCategory
O40.9XX0Polyhydramnios, unspecified trimester, not applicable or unspecifiedBillable
O40.9XX1Polyhydramnios, unspecified trimester, fetus 1Billable
O40.9XX2Polyhydramnios, unspecified trimester, fetus 2Billable
O40.9XX3Polyhydramnios, unspecified trimester, fetus 3Billable
O40.9XX4Polyhydramnios, unspecified trimester, fetus 4Billable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.