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ICD-10-CM Codes
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O00-O9A
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O20-O29
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O21-
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2023 ICD-10-CM Diagnosis Code O21
2023 ICD-10-CM Diagnosis Code O21
Excessive vomiting in pregnancy
2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
- O21 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2023 edition of ICD-10-CM O21 became effective on October 1, 2022.
- This is the American ICD-10-CM version of O21 - other international versions of ICD-10 O21 may differ.
The following code(s) above
O21 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to
O21:
Clinical Information
- Intractable vomiting that develops in early pregnancy and persists. This can lead to dehydration and weight loss.
- Severe, intractable vomiting during pregnancy (usually the first trimester) accompanied by dehydration, weight loss, and electrolyte imbalances.
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2023 (effective 10/1/2022): No change
Code annotations containing back-references to O21:
ICD-10-CM Codes Adjacent To O21
O16.1 Unspecified maternal hypertension, first trimester
O16.2 Unspecified maternal hypertension, second trimester
O16.3 Unspecified maternal hypertension, third trimester
O16.4 Unspecified maternal hypertension, complicating childbirth
O16.5 Unspecified maternal hypertension, complicating the puerperium
O16.9 Unspecified maternal hypertension, unspecified trimester
O20 Hemorrhage in early pregnancy
O20.0 Threatened abortion
O20.8 Other hemorrhage in early pregnancy
O20.9 Hemorrhage in early pregnancy, unspecified
O21
Excessive vomiting in pregnancy
O21.0 Mild hyperemesis gravidarum
O21.1 Hyperemesis gravidarum with metabolic disturbance
O21.2 Late vomiting of pregnancy
O21.8 Other vomiting complicating pregnancy
O21.9 Vomiting of pregnancy, unspecified
O22 Venous complications and hemorrhoids in pregnancy
O22.0 Varicose veins of lower extremity in pregnancy
O22.00 …… unspecified trimester
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.