ICD-10 Code B52 – Plasmodium malariae malaria (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B52 – Plasmodium malariae malaria
What it is
B52 identifies malaria caused by Plasmodium malariae. Use it when the record confirms this specific parasite as the cause of the infection.
Clinical signs
Clinical features vary; refer to documentation. Typical malaria findings may include fever, chills, headache, and malaise, but the organism must be identified or clearly documented.
When to use this code
Use B52 when the provider documents Plasmodium malariae malaria, quartan malaria, or confirms this species on testing. It also applies when the chart clearly ties the illness to P. malariae. Check documentation if the species is not specified.
Do not use for
Do not use this code for malaria caused by other Plasmodium species or for unspecified malaria. If the record only says “malaria” without a species, use the appropriate unspecified code instead.
Coding tip
Verify the parasite species in the final diagnosis, not just the initial suspicion, before assigning B52.