O21.0
O21.0: Mild hyperemesis gravidarum
Billable / specific codeICD-10-CM
O21.0 is a billable, specific ICD-10-CM code for mild hyperemesis gravidarum. It is valid for submission on a claim.
Check O21.0 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Hyperemesis gravidarum, mild or unspecified, starting before the end of the 20th week of gestation
Other codes that can never be billed with O21.0
Their own Excludes1 notes name this code, so the conflict is not listed above.
- R11Nausea and vomiting
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
O21.0 is named in 1 Medicare coverage policy: 1 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A57189Billing and Coding: Serum Magnesium
Alphabetic index entries that lead here
- Hyperemesis›gravidarum(mild)
Code history
Unchanged in every release from FY2024 to FY2027.