O21 Excessive vomiting in pregnancy

The ICD-10-CM code for Excessive vomiting in pregnancy is O21 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

15: Pregnancy, childbirth and the puerperium (O00-O9A)

Section

O20-O29: Other maternal disorders predominantly related to pregnancy (O20-O29)

Category O21

6 codes (5 billable)

FY2026 Status

Stable since FY2024

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool