ICD-10 Code A75.0 – Epidemic louse-borne typhus fever due to Rickettsia prowazekii (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A75.0 – Epidemic louse-borne typhus fever due to Rickettsia prowazekii
What it is
This code identifies epidemic louse-borne typhus, an acute infectious disease caused by Rickettsia prowazekii. Use it when the record specifically documents this organism or diagnosis.
Clinical signs
Typical findings include sudden fever, headache, rash, and systemic illness. Clinical features vary; refer to documentation for confirmed signs, exposure history, or laboratory support.
When to use this code
Use A75.0 when the clinician documents epidemic louse-borne typhus fever due to Rickettsia prowazekii. It may also apply when the chart clearly links typhus to louse exposure and this organism. If the record is nonspecific, check documentation before coding.
Do not use for
Do not use this code for other rickettsial infections, murine typhus, or typhus fever without organism confirmation. Check documentation if the type of typhus is not clearly stated.
Coding tip
Capture the exact organism and typhus type from the provider note; vague “typhus” wording may require clarification.