O40 is the ICD-10 code for Polyhydramnios. It is a three-character category that is not subdivided further. It belongs to the block O30–O48 (Maternal care related to the fetus and amniotic cavity and possible delivery problems) in Chapter XV, Pregnancy, childbirth and the puerperium.
- Code type
- Category (3 characters)
- Chapter
- XV · O00–O99
- Classification
- WHO ICD-10, 2019 version
What O40 includes
Conditions and terms that are coded here.
- Hydramnios
O40 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
O40Polyhydramnion
DO40Graviditet med for meget fostervand
- DO409Hydramnion
O40Lapsiveden runsaus
O40Polyhydramnion
O40Hydramnios
O40polyhydramnie
Listed through more specific codes:
- O40.1XX0Polyhydramnios, first trimester, not applicable or unspecified
- O40.1XX1Polyhydramnios, first trimester, fetus 1
- O40.1XX2Polyhydramnios, first trimester, fetus 2
- O40.1XX3Polyhydramnios, first trimester, fetus 3
- O40.1XX4Polyhydramnios, first trimester, fetus 4
- O40.1XX5Polyhydramnios, first trimester, fetus 5
- O40.1XX9Polyhydramnios, first trimester, other fetus
- O40.2XX0Polyhydramnios, second trimester, not applicable or unspecified
- and 20 more national subcodes
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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