ICD-10 Code A25.9 – Rat-bite fever, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A25.9 – Rat-bite fever, unspecified
What it is
A25.9 identifies rat-bite fever when the documentation does not specify the organism or type. Use this code for the diagnosis as stated, without adding details that are not recorded.
Clinical signs
Clinical features vary; refer to documentation. Rat-bite fever may present with fever, rash, and joint symptoms after exposure to rodents or contaminated food or water.
When to use this code
Use A25.9 when the provider documents rat-bite fever but does not identify a specific form or cause. It also fits cases where the record confirms the diagnosis yet lacks further detail. Check documentation if the note names a more specific rat-bite fever type.
Do not use for
Do not use this code for a suspected exposure without a confirmed diagnosis. It is also wrong when the chart specifies a different infectious disease or a more detailed rat-bite fever code.
Coding tip
Code only what is documented, and query for specificity when the record says rat-bite fever but leaves the organism or type unclear.