O21.0

Billable

Mild hyperemesis gravidarum

O21.0 is the ICD-10-CM code for Mild hyperemesis gravidarum. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
O00-O9A
Parent
O21
Edition
FY2026

O00-O9A Pregnancy, childbirth and the puerperium

Includes

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

Frequently asked questions

What is ICD-10 code O21.0?
O21.0 is the ICD-10-CM code for "Mild hyperemesis gravidarum". It falls under O00-O9A Pregnancy, childbirth and the puerperium.
Is O21.0 a billable code?
Yes — O21.0 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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