O40 ICD-10-CM Code: Polyhydramnios
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
O40Polyhydramnios
ICD-10-CM diagnosis code · United States clinical modification
Where O40 sits
- 1
Chapter 15
Pregnancy, childbirth and the puerperium (O00-O9A)
- 2
Section
Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
- 3
Category O40
Polyhydramnios
- 4
Code O40
Polyhydramnios
Codes under O40
O40 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for O40.
Code first
No “code first” instruction is listed for O40.
Use additional code
No “use additional code” instruction is listed for O40.
Excludes1
Conditions that should not be reported together with this code.
- encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for O40.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code O40 mean?
O40 is the FY 2027 U.S. ICD-10-CM code for “Polyhydramnios.”
Is O40 a billable or specific ICD-10-CM code?
No. O40 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is O40 located in ICD-10-CM?
O40 is listed in Chapter 15, Pregnancy, childbirth and the puerperium (O00-O9A), within Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48) (O30–O48), under category O40, Polyhydramnios.
What coding notes are listed for O40?
No inclusion terms are listed for O40 in this reference record. No code-first instruction is listed. Excludes1 notes: encounter for suspected maternal and fetal conditions ruled out (Z03.7-). No Excludes2 note is listed.