ICD-10 Code B54 – Unspecified malaria (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B54 – Unspecified malaria
What it is
B54 is used when malaria is documented, but the species or type is not specified. It indicates a confirmed malaria diagnosis without enough detail to assign a more specific code.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include fever, chills, sweating, headache, and malaise, but these are not specific to one malaria type.
When to use this code
Use B54 when the provider records malaria and does not identify the infecting Plasmodium species. It also fits cases where the chart lacks enough detail to code a more specific malaria category. Do not infer the species from travel history alone.
Do not use for
Do not use B54 if the record names a specific malaria organism or another malaria complication code applies. Check documentation if the diagnosis is uncertain or only suspected.
Coding tip
Code the most specific malaria diagnosis available; if the species is missing, B54 is the correct fallback.