O21: Excessive vomiting in pregnancy

Codes under O21 (Excessive vomiting in pregnancy). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
O21.0	Mild hyperemesis gravidarum	✓
O21.1	Hyperemesis gravidarum with metabolic disturbance	✓
O21.2	Late vomiting of pregnancy	✓
O21.8	Other vomiting complicating pregnancy	✓
O21.9	Vomiting of pregnancy, unspecified	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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