O21.8 — Other vomiting complicating pregnancy
Is O21.8 billable?
Yes — O21.8 is billable for FY2027. O21.8 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. O21.8 may be submitted for encounters from October 1, 2026 through September 30, 2027.
O21.8 at a glance
| Code | O21.8 |
|---|---|
| Description | Other vomiting complicating pregnancy |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does O21.8 group to?
O21.8 sits in MDC 14 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 817Other Antepartum Diagnoses with O.R. Procedures with MCCsurgical
- 818Other Antepartum Diagnoses with O.R. Procedures with CCsurgical
- 819Other Antepartum Diagnoses with O.R. Procedures without CC/MCCsurgical
How is O21.8 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to O21.8. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Pregnancy › complicated by › vomiting › due to diseases classified elsewhere (single) (uterine)
Use additional code
Report an additional code alongside O21.8 to fully describe the condition. O21.8 is sequenced first.
- code, to identify cause.
Inclusion terms
Alternative wording in documentation that is classified to O21.8.
- Vomiting due to diseases classified elsewhere, complicating pregnancy
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O21.8 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- supervision of normal pregnancy (Z34.-)
Use additional code — inherited from Chapter 15
Report an additional code alongside O21.8 to fully describe the condition. O21.8 is sequenced first.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Excludes2 — not included here — inherited from Chapter 15
The conditions below are not part of O21.8, but a patient may have both at the same time. When documentation supports it, O21.8 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O20-O29
The conditions below are not part of O21.8, but a patient may have both at the same time. When documentation supports it, O21.8 and the excluded code may both be reported.
How long has O21.8 existed?
O21.8 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.