O21.9

Billable

ChapterO00–O9A

Ranksubcategory

Official Description

Vomiting of pregnancy, unspecified

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 15: Pregnancy, Childbirth and the Puerperium (O00-O9A).

General instructions are available for the parent sections:

View CH15 Notes View O20-O29 Notes

Clinical Hierarchy

CH15Pregnancy, childbirth and the puerperium (O00-O9A)

O20-O29Other maternal disorders predominantly related to pregnancy (O20-O29)

O21Excessive vomiting in pregnancy

O21.9Vomiting of pregnancy, unspecified

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to O21.9:

blockO20-O29

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

View context instructions

chapterCH15

Pregnancy, childbirth and the puerperium (O00-O9A)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to O21.9. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

1 raw paths

Pregnancy (single) (uterine)1 unique routes

complicated by (care of) (management affected by)

vomiting→O21.9

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 817

Other Antepartum Diagnoses with O.R. Procedures with MCC

DRG 818

Other Antepartum Diagnoses with O.R. Procedures with CC

DRG 819

Other Antepartum Diagnoses with O.R. Procedures without CC/MCC

DRG 831

Other Antepartum Diagnoses without O.R. Procedures with MCC

DRG 832

Other Antepartum Diagnoses without O.R. Procedures with CC

DRG 833

Other Antepartum Diagnoses without O.R. Procedures without CC/MCC

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Vomiting of pregnancy, unspecified.

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