O21.0

✓ Billable

Mild hyperemesis gravidarum

Pregnancy, childbirth and the puerperium (O00-O9A)

Also Known As

Hyperemesis gravidarum, mild or unspecified, starting before the end of the 20th week of gestation

✅ No additional coding notes for O21.0

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Code Information

CodeO21.0

BillableYes

ParentO21

CategoryPregnancy, childbirth and the puerperium (O00-O9A)

Excludes10 rule(s)

Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)