ICD-10-CM · Chapter 15 · O00-O9A
O21 Excessive vomiting in pregnancy
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| O21..0 | Mild hyperemesis gravidarum | Yes |
| O21..1 | Hyperemesis gravidarum with metabolic disturbance | Yes |
| O21..2 | Late vomiting of pregnancy | Yes |
| O21..8 | Other vomiting complicating pregnancy | Yes |
| O21..9 | Vomiting of pregnancy, unspecified | Yes |
Plain-language term for this code
The following entry in the US Medical Glossary corresponds to ICD-10-CM category O21:
- Morning Sickness — Náuseas del embarazo
Last reviewed: September 2026