O21
Non-billableExcessive vomiting in pregnancy
Excessive vomiting in pregnancy
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
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.
Child Codes (5)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(21)
UMLS
- Excess vomiting in pregnancyC0020450
- Excessive pregnancy vomitingC0020450
- Excessive vomiting in pregnancyC0020450
- Excessive vomiting in pregnancy (disorder)C0020450
- HyperemesisC0020450
- Hyperemesis GravidarumC0020450
- Hyperemesis arising during pregnancyC0020450
- Hyperemesis gravidarumC0020450
- Hyperemesis in pregnancyC0020450
- Hyperemesis of pregnancyC0020450
- Pernicious Vomiting of PregnancyC0020450
- Persistent AND/OR vicious vomiting arising during pregnancyC0020450
- Pregnancy Pernicious VomitingC0020450
- excessive vomiting in pregnancyC0020450
- excessive vomiting pregnancyC0020450
- gravidarum hyperemesisC0020450
- hyperemesis gravidarumC0020450
- hyperemesis in pregnancyC0020450
- hyperemesis of pregnancyC0020450
- hyperemesis pregnancyC0020450
- pregnancy hyperemesisC0020450
Frequently Asked Questions
What is the ICD-10 code for excessive vomiting in pregnancy?
The ICD-10-CM code for excessive vomiting in pregnancy is O21. The full clinical description is "Excessive vomiting in pregnancy". O21 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code O21 mean?
ICD-10-CM code O21 represents “Excessive vomiting in pregnancy”. It is classified under Chapter 15: Pregnancy, Childbirth and the Puerperium and is a non-billable header code. Use a more specific child code for billing purposes.
Is O21 a billable code?
No, O21 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 5 child codes under O21.
What chapter is O21 in?
O21 is in Chapter 15: Pregnancy, Childbirth and the Puerperium (codes O00-O9A).
What codes cannot be used with O21?
O21 has Excludes1 notes indicating codes that cannot be used together with it, including: supervision of normal pregnancy (Z34.-).
What are the subcategories under O21?
O21 has 5 child codes, including: O21.0 (Mild hyperemesis gravidarum), O21.1 (Hyperemesis gravidarum with metabolic disturbance), O21.2 (Late vomiting of pregnancy), O21.8 (Other vomiting complicating pregnancy), and 1 more.
Are additional codes required with O21?
Yes, when using O21, also report: code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known..
What are the UMLS CUIs for O21?
O21 is linked to 1 UMLS Concept Unique Identifier: C0020450. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does O21 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like excessive vomiting in pregnancy 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?
O21 maps to the ICD-11 code: JA60.Z (Excessive vomiting in pregnancy, unspecified).
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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.