O21.0Billable

Mild hyperemesis gravidarum

Chapter
15. Pregnancy, childbirth and the puerperium
Category
O21
Effective date
October 1, 2026

Related codes in category O21

O21Excessive vomiting in pregnancyO21.1Hyperemesis gravidarum with metabolic disturbanceYesO21.2Late vomiting of pregnancyYesO21.8Other vomiting complicating pregnancyYesO21.9Vomiting of pregnancy, unspecifiedYes

Frequently asked questions

What is ICD-10 code O21.0?

O21.0 is an ICD-10-CM diagnosis code for Mild hyperemesis gravidarum.

Is O21.0 a billable code?

Yes. O21.0 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is O21.0 in?

O21.0 falls under Chapter 15: Pregnancy, childbirth and the puerperium.

When did O21.0 become effective?

O21.0 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to O21.0?

O21.0 belongs to category O21, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.