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.
Status
Non-billable / Header
Block
O20-O29
Child Codes
5
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- supervision of normal pregnancy (Z34.-)
Excludes 2
Conditions not included here, but the patient may have both
- mental and behavioral disorders associated with the puerperium (F53.-)
- obstetrical tetanus (A34)
- postpartum necrosis of pituitary gland (E23.0)
- puerperal osteomalacia (M83.0)
- 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)
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)
Also Known As / Clinical Terms
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 ICD-10 code O21?
ICD-10-CM code O21 represents "Excessive vomiting in pregnancy". It 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 you should also code: 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.
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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.