O21

Non-billable

Excessive vomiting in pregnancy

O21 is the ICD-10-CM code for Excessive vomiting in pregnancy. It is a non-billable category code — use a more specific child code such as O21.0 for billing.

Status
Header (non-billable)
Chapter
O00-O9A
Subcodes
5
Edition
FY2026

O00-O9A Pregnancy, childbirth and the puerperium

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code O21?
O21 is the ICD-10-CM code for "Excessive vomiting in pregnancy". It falls under O00-O9A Pregnancy, childbirth and the puerperium.
Is O21 a billable code?
No — O21 is a non-billable header code. Use a more specific child code (such as O21.0) for billing.
What are the subcodes of O21?
O21 has 5 more specific child codes, including O21.0, O21.1, O21.2.

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

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