Excessive vomiting in pregnancy (O21) ICD-10-CM
The O21 code range covers excessive vomiting in pregnancy with 6 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the O21 Range 6 codes · 5 billable
About the O21 Code Range
Excessive vomiting during pregnancy includes hyperemesis gravidarum, a term for excessive vomiting in pregnancy, and other forms of vomiting that complicate pregnancy.
O21.0 identifies mild hyperemesis gravidarum, while O21.1 identifies hyperemesis gravidarum with metabolic disturbance. The remaining subdivisions distinguish late vomiting of pregnancy (O21.2), other vomiting complicating pregnancy (O21.8), and vomiting of pregnancy that is unspecified (O21.9).
Questions About This Page
How many billable codes are in the O21 range?
Of the 6 codes in this range, 5 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the O21 range classify?
The range classifies excessive vomiting in pregnancy. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
