What is the ICD-10 code for Polyhydramnios, first trimester?

The ICD-10-CM code for Polyhydramnios, first trimester is O40.1 (fiscal year 2026). It is a billable diagnosis code.

What does ICD-10 code O40.1 mean?

O40.1 is the ICD-10-CM diagnosis code for Polyhydramnios, first trimester. Polyhydramnios, first trimester

Is O40.1 a billable ICD-10 code?

Yes, O40.1 is a billable ICD-10-CM code that can be used on medical claims.

What chapter is O40.1 in?

O40.1 is classified under Chapter 15: Pregnancy, childbirth and the puerperium (O00-O9A), Section O30-O48: Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48).

O40.1 Polyhydramnios, first trimester

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The ICD-10-CM code for Polyhydramnios, first trimester is O40.1 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter: 15: Pregnancy, childbirth and the puerperium (O00-O9A)
Section: O30-O48: Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
Category O40: 5 codes (4 billable)
FY2026 Status: Stable since FY2024

References

CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
CDC/NCHS — ICD-10-CM Files and Browser Tool

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Parent Code

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Reviewed by Prajwal Shrestha, CPC, CRC

Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01