ICD-10 Code A25 – Rat-bite fevers (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A25 – Rat-bite fevers
What it is
Code A25 identifies rat-bite fevers, a group of bacterial infections usually linked to exposure to rodents or their secretions. Use it when the record documents this diagnosis, including rat-bite fever or spirillary fever.
Clinical signs
Clinical features commonly include fever, rash, and joint pain after rodent exposure. Clinical features vary; refer to documentation for the specific organism or presentation.
When to use this code
Use A25 when the clinician documents rat-bite fever or another rat-bite fever diagnosis without a more specific code. It may also apply when the note links the illness to a rat bite, scratch, or contact with contaminated material. Check documentation if the organism is specified.
Do not use for
Do not use this code for simple animal bites without infection or for unrelated febrile illnesses. If the record names a different zoonotic infection, code that condition instead.
Coding tip
Look for explicit documentation of rat-bite fever and any stated organism before assigning A25.