ICD-10-CM › O00-O9A › O20-O29 › O21 Excessive vomiting in pregnancy › O21.0
Mild hyperemesis gravidarum
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 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.
- FY2007 Added to the draft code set draft Mild hyperemesis gravidarum
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 the O20-O29 section Other maternal disorders predominantly related to pregnancy (O20-O29)
Excludes2 - not included here
- maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
- maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)
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
- Nausea > gravidarum
- 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 > complicated by > hyperemesis
- 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
- Pregnancy > complicated by > vomiting > hyperemesis gravidarum
- Necrosis, necrotic > kidney > tubular > complicating > pregnancy
- Hyperemesis > gravidarum
- Pregnancy > complicated by > hyperemesis
- Pregnancy > complicated by > vomiting > hyperemesis gravidarum
Codes in the same group
| Code | Description | Status |
|---|---|---|
| O21.1 | Hyperemesis gravidarum with metabolic disturbance | Valid |
| O21.2 | Late vomiting of pregnancy | Valid |
| O21.8 | Other vomiting complicating pregnancy | Valid |
| O21.9 | Vomiting of pregnancy, unspecified | Valid |