O21.0
BillableMild hyperemesis gravidarum
Mild hyperemesis gravidarum
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Hyperemesis gravidarum, mild or unspecified, starting before the end of the 20th week of gestation
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •mental and behavioral disorders associated with the puerperiumF53
- •obstetrical tetanusA34
- •postpartum necrosis of pituitary glandE23.0
- •puerperal osteomalaciaM83.0
- •maternal care related to the fetus and amniotic cavity and possible delivery problemsO30-O48
- •maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperiumO98-O99
Use Additional Code
Additional codes that should follow this code
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Related Codes(4)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(28)
SNOMED CT
- Excessive pregnancy vomiting14094001
- Excessive vomiting in pregnancy14094001
- Hyperemesis arising during pregnancy14094001
- Hyperemesis gravidarum14094001
- Hyperemesis in pregnancy14094001
- Hyperemesis of pregnancy14094001
- Persistent AND/OR vicious vomiting arising during pregnancy14094001
- Mild hyperemesis before end of 22 weeks of gestation19569008
- Mild hyperemesis gravidarum19569008
- Mild hyperemesis in pregnancy19569008
- Moderate hyperemesis gravidarum129597002
- Hyperemesis444673007
UMLS
Clinical Terms
- Hyperemesis of pregnancy
- Mild hyperemesis in pregnancy
- Persistent AND/OR vicious vomiting arising during pregnancy
- Hyperemesis gravidarum, mild or unspecified, starting before the end of the 20th week of gestation
- Hyperemesis in pregnancy
- Hyperemesis gravidarum
- Excessive pregnancy vomiting
- Hyperemesis
- Moderate hyperemesis gravidarum
- Hyperemesis arising during pregnancy
- Mild hyperemesis gravidarum (disorder)
- Mild hyperemesis before end of 22 weeks of gestation
Frequently Asked Questions
What is the ICD-10 code for mild hyperemesis gravidarum?
The ICD-10-CM code for mild hyperemesis gravidarum is O21.0. The full clinical description is "Mild hyperemesis gravidarum". O21.0 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code O21.0 mean?
ICD-10-CM code O21.0 represents “Mild hyperemesis gravidarum”. It is classified under Chapter 15: Pregnancy, Childbirth and the Puerperium and is a billable/specific code that can be used on a claim.
Is O21.0 a billable code?
Yes, O21.0 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is O21.0 in?
O21.0 is in Chapter 15: Pregnancy, Childbirth and the Puerperium (codes O00-O9A).
What codes cannot be used with O21.0?
O21.0 has Excludes1 notes indicating codes that cannot be used together with it, including: supervision of normal pregnancy (Z34.-).
Are additional codes required with O21.0?
Yes, when using O21.0, also report: code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known..
What SNOMED CT codes does O21.0 map to?
O21.0 maps to 4 SNOMED CT concepts: 14094001, 444673007, 19569008, 129597002. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for O21.0?
O21.0 is linked to 2 UMLS Concept Unique Identifiers: C2903593, C0020451. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does O21.0 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like mild hyperemesis gravidarum affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of O21.0?
O21.0 maps to the ICD-11 code: JA60.0 (Mild hyperemesis gravidarum).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.