ICD-10-CM › O00-O9A › O30-O48 › O40 Polyhydramnios › O40.9
Polyhydramnios, unspecified trimester
Not billableICD-10-CM diagnosis code.
This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.
Submit one of these 7 more specific codes instead:
- O40.9XX0 Polyhydramnios, unspecified trimester, not applicable or unspecified
- O40.9XX1 Polyhydramnios, unspecified trimester, fetus 1
- O40.9XX2 Polyhydramnios, unspecified trimester, fetus 2
- O40.9XX3 Polyhydramnios, unspecified trimester, fetus 3
- O40.9XX4 Polyhydramnios, unspecified trimester, fetus 4
- O40.9XX5 Polyhydramnios, unspecified trimester, fetus 5
- O40.9XX9 Polyhydramnios, unspecified trimester, other fetus
This code requires a seventh character. See the rule below.
What has happened to this code
Every change the publisher made, from 2014 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.
- FY2014 Added to the draft code set draft Polyhydramnios, unspecified trimester
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.
Inherited from O40 Polyhydramnios
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.
- Cicatrix
- Sialorrhea
- Anteflexion
- Itch, itching
- Pinpoint > os
- Stricture > vagina
- Anteversion > cervix
- Stricture > os uteri
- Pregnancy > high-risk
- Supervision > pregnancy
- Disease, diseased > renal
- Occlusion, occluded > cervix
- Pregnancy > normal > high-risk
- Stricture > uterus, uterine > os
- Supervision > high-risk pregnancy
- Pregnancy > examination > high-risk
- Occlusion, occluded > cervical canal
- Stenosis, stenotic > endocervical os
- Encounter > pregnancy > supervision of
- Pregnancy > prenatal care only > high-risk
- Contraction, contracture, contracted > cervix
- Pregnancy > complicated by > previous history of
- Contraction, contracture, contracted > internal os
- Prediabetes, prediabetic > complicating > pregnancy
- Necrosis, necrotic > kidney > tubular > complicating > pregnancy
- Hydramnios
- Polyhydramnios
- Pregnancy > complicated by > hydramnios
- Pregnancy > complicated by > polyhydramnios
- Pregnancy > complicated by > hydrops > amnii
Codes in the same group
| Code | Description | Status |
|---|---|---|
| O40.1 | Polyhydramnios, first trimester | Not billable |
| O40.2 | Polyhydramnios, second trimester | Not billable |
| O40.3 | Polyhydramnios, third trimester | Not billable |