O21.8 — Other vomiting complicating pregnancy
O21.8 is a billable, specific ICD-10-CM code for other vomiting complicating pregnancy. It is valid for submission on a claim.
Use additional code
Add a secondary code to capture the detail described below.
- code, to identify cause.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Vomiting due to diseases classified elsewhere, complicating pregnancy
Risk adjustment
O21.8 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
O21.8 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57189Billing and Coding: Serum Magnesium
How O21.8 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to O21.8.
- Pregnancy›complicated by›vomiting›due to diseases classified elsewhere
Related codes at this level
Codes that share O21. If O21.8 is not quite right, the correct code is usually one of these.
Questions about O21.8
- Is O21.8 a billable ICD-10-CM code?
- Yes. O21.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does O21.8 sit in the tabular list?
- Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other maternal disorders predominantly related to pregnancy (O20-O29).