B51.9 — Plasmodium vivax malaria without complication
B51.9 is a billable, specific ICD-10-CM code for plasmodium vivax malaria without complication. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Plasmodium vivax malaria NOS
Risk adjustment
B51.9 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
B51.9 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A58801Billing and Coding: Pharmacogenomics Testing
- A58812Billing and Coding: Pharmacogenomics Testing
- A59915Billing and Coding: Pharmacogenomic Testing
How B51.9 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 B51.9.
- Malaria, malarial›vivax
- Malaria, malarial›Plasmodium›vivax NEC
Related codes at this level
Codes that share B51. If B51.9 is not quite right, the correct code is usually one of these.
Questions about B51.9
- Is B51.9 a billable ICD-10-CM code?
- Yes. B51.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does B51.9 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Protozoal diseases (B50-B64).