O40
Non-billablePolyhydramnios
O40 is the ICD-10-CM code for Polyhydramnios. It is a non-billable category code — use a more specific child code such as O40.1 for billing.
- Status
- Header (non-billable)
- Chapter
- O00-O9A
- Subcodes
- 4
- Edition
- FY2026
O00-O9A Pregnancy, childbirth and the puerperium
What this means — in plain language
MedlinePlus · NIHWhat are health problems in pregnancy? A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus . Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy. But just because you have health problems,…
Read more about Health Problems in Pregnancy at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •hydramnios
Excludes1 — not coded here
- •encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
Frequently asked questions
- What is ICD-10 code O40?
- O40 is the ICD-10-CM code for "Polyhydramnios". It falls under O00-O9A Pregnancy, childbirth and the puerperium.
- Is O40 a billable code?
- No — O40 is a non-billable header code. Use a more specific child code (such as O40.1) for billing.
- What is excluded from O40?
- Excludes1 (not coded here): encounter for suspected maternal and fetal conditions ruled out (Z03.7-).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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