ICD-10 Code B52.9 – Plasmodium malariae malaria without complication (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B52.9 – Plasmodium malariae malaria without complication
What it is
B52.9 identifies malaria caused by Plasmodium malariae when no complication is documented. Use it for an uncomplicated infection confirmed or suspected to be due to this parasite.
Clinical signs
Clinical features vary; refer to documentation. Typical malaria presentations may include fever, chills, sweats, headache, and malaise, but the record should support Plasmodium malariae without noted complications.
When to use this code
Use B52.9 when the provider documents Plasmodium malariae malaria and does not describe severe disease, organ involvement, or other complications. It also fits when the chart clearly states uncomplicated malaria due to this species. If species or complication status is unclear, check documentation before coding.
Do not use for
Do not use this code for malaria caused by another Plasmodium species or for complicated, severe, or cerebral malaria. If the note does not specify Plasmodium malariae, verify the organism first.
Coding tip
Confirm both the species and the absence of complications in the provider note before assigning B52.9.