ICD-10 Code A48.4 – Brazilian purpuric fever (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A48.4 – Brazilian purpuric fever
What it is
A48.4 identifies Brazilian purpuric fever, a serious bacterial infection caused by Haemophilus influenzae biogroup aegyptius. It is a rare illness that can progress quickly and requires prompt recognition in clinical records.
Clinical signs
Typical findings include fever, conjunctivitis, and a rapidly spreading purpuric rash. Clinical features vary; refer to documentation for confirmed systemic involvement or complications.
When to use this code
Use A48.4 when the provider documents Brazilian purpuric fever by name or clearly describes the condition. It is appropriate when the record supports this specific diagnosis, not just eye infection or nonspecific purpura. Check documentation if the chart only notes suspected infection.
Do not use for
Do not use this code for uncomplicated conjunctivitis, generic bacteremia, or other purpuric illnesses without documentation of Brazilian purpuric fever. If the diagnosis is uncertain, code the documented signs instead.
Coding tip
Capture the exact provider wording, because this code is for a very specific diagnosis and should not be assigned from symptoms alone.