ICD-10-CM › O00-O9A › O30-O48 › O41.1 Infection of amniotic sac and membranes › O41.12
Chorioamnionitis
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 4 more specific codes instead:
- O41.121 Chorioamnionitis, first trimester (also a header)
- O41.122 Chorioamnionitis, second trimester (also a header)
- O41.123 Chorioamnionitis, third trimester (also a header)
- O41.129 Chorioamnionitis, 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.
- FY2012 Added to the draft code set draft Chorioamnionitis
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 O41 Other disorders of amniotic fluid and membranes
Seventh character required
- One of the following 7th characters is to be assigned to each code under category O41. 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 O41 that has a 7th character of 1 through 9.
Excludes1 - never coded here
- encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
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
- Membranitis
- 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
- Triple I
- Chorioamnionitis
- Pregnancy > complicated by > amnionitis
- Pregnancy > complicated by > chorioamnionitis
- Pregnancy > complicated by > infection > intrauterine
- Pregnancy > complicated by > inflammation > intrauterine
- Infection, infected, infective > intrauterine inflammation
- Infection, infected, infective > amniotic fluid, sac or cavity > chorioamnionitis
Codes in the same group
| Code | Description | Status |
|---|---|---|
| O41.10 | Infection of amniotic sac and membranes, unspecified | Not billable |
| O41.14 | Placentitis | Not billable |