Rat-bite fevers (A25) ICD-10-CM
The A25 code range covers rat-bite fevers with 4 ICD-10-CM diagnosis codes. 3 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the A25 Range 4 codes · 3 billable
About the A25 Code Range
The ICD-10 code A25 covers rat-bite fevers, which are bacterial infections transmitted through bites or exposure to rats. This section includes more specific infections like spirillosis and streptobacillosis, commonly called rat bite fever.
Rat-bite fever is classified under the codes A25.0 for spirillosis and A25.1 for streptobacillosis, reflecting infections caused by distinct bacteria: Spirillum and Streptobacillus species, respectively. Both conditions share synonyms such as “rat bite fever,” “spirillary fever,” or “streptobacillary fever,” helping healthcare providers and medical coders accurately link symptoms and diagnoses to these ICD-10 codes. When the exact bacterial cause is unknown, A25.9 is used for unspecified rat-bite fever cases. By capturing these distinctions, the ICD-10 code for rat-bite fevers ensures precise documentation and aids in targeted treatment and epidemiological tracking of these uncommon but serious infections.
Questions About This Page
How many billable codes are in the A25 range?
Of the 4 codes in this range, 3 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the A25 range classify?
The range classifies rat-bite fevers. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
