O20.0 — Threatened abortion
O20.0 is a billable, specific ICD-10-CM code for threatened abortion. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Hemorrhage specified as due to threatened abortion
Risk adjustment
O20.0 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
O20.0 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 O20.0 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 O20.0.
- Abortion›threatened(spontaneous)
- Threatened›abortion
- Threatened›miscarriage
- Abortion›spontaneous›threatened
- Hemorrhage, hemorrhagic›antepartum›before 20 weeks gestation›threatened abortion
- Pregnancy›complicated by›hemorrhage›threatened abortion
- Pregnancy›complicated by›threatened›abortion
Related codes at this level
Codes that share O20. If O20.0 is not quite right, the correct code is usually one of these.
Questions about O20.0
- Is O20.0 a billable ICD-10-CM code?
- Yes. O20.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does O20.0 sit in the tabular list?
- Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other maternal disorders predominantly related to pregnancy (O20-O29).