ICD-10 Code A77.2 – Spotted fever due to Rickettsia siberica (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A77.2 – Spotted fever due to Rickettsia siberica
What it is
A77.2 identifies spotted fever caused by Rickettsia siberica, a tick-borne rickettsial infection. Use it when the record specifically names this organism or clearly documents the corresponding spotted fever diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Typical spotted fever presentations may include fever, headache, rash, and a history of tick exposure, but you should code only what the provider confirms.
When to use this code
Use this code when the clinician documents spotted fever due to Rickettsia siberica, or when the final diagnosis names that organism. It also fits discharge summaries and problem lists that clearly support the confirmed infection. If the record only says “suspected” or “rule out,” check documentation before coding.
Do not use for
Do not use A77.2 for other rickettsial diseases, unspecified spotted fever, or tick exposure without a confirmed infection. If the organism is not identified, check documentation.
Coding tip
Code the specific organism only when the provider documents it; otherwise, use the more precise confirmed diagnosis available in the chart.