ICD-10 Code B53 – Other specified malaria (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B53 – Other specified malaria
What it is
B53 is used for malaria cases that do not fit the standard species-specific categories. It captures an identified malaria infection when documentation supports a different or less common form.
Clinical signs
Clinical features vary; refer to documentation. Malaria commonly presents with fever and may include chills, sweating, headache, malaise, or anemia, but the exact pattern depends on the organism and disease stage.
When to use this code
Use B53 when the record clearly states malaria, but the provider does not document a more specific ICD-10 category. It may also apply when the infection is described as an other specified form that is not captured elsewhere. If the species or type is documented, code that specific option instead.
Do not use for
Do not use this code for unspecified malaria when the record lacks enough detail; check documentation. Also avoid it when a more specific malaria code is supported by the provider note.
Coding tip
Review the organism name and clinical wording carefully before assigning B53.