ICD-10-CM › O00-O9A › O30-O48 › O codes › O40

O40

Polyhydramnios

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 4 more specific codes instead:

  • O40.1 Polyhydramnios, first trimester (also a header)
  • O40.2 Polyhydramnios, second trimester (also a header)
  • O40.3 Polyhydramnios, third trimester (also a header)
  • O40.9 Polyhydramnios, unspecified trimester (also a header)

This code requires a seventh character. See the rule below.

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2012 Added to the draft code set draft Polyhydramnios

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

This code

Seventh character required

  • One of the following 7th characters is to be assigned to each code under category O40. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O40 that has a 7th character of 1 through 9.

Excludes1 - never coded here

  • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)

Includes

  • hydramnios

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.