Tularemia (A21) ICD-10-CM
The A21 code range covers tularemia with 8 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- deer-fly fever
- infection due to Francisella tularensis
- rabbit fever
Codes in the A21 Range 8 codes · 7 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A21 range.
Francisella tularensis
The etiologic agent of TULAREMIA in man and other warm-blooded animals.
Tularemia
A plague-like disease of rodents, transmissible to man. It is caused by FRANCISELLA TULARENSIS and is characterized by fever, chills, headache, backache, and weakness.
About the A21 Code Range
The ICD-10 code for tularemia (A21) covers a range of bacterial infections caused by the Francisella bacterium, affecting various parts of the body. These codes specify the form of tularemia diagnosed, helping guide treatment and reporting.
This section includes codes for specific types like ulceroglandular (A21.0), which involves skin ulcers and swollen glands, also known as glandular tularemia. Oculoglandular tularemia (A21.1) affects the eye and nearby lymph nodes, sometimes called bacterial corneal ulcer. Pulmonary tularemia (A21.2) relates to lung infection similar to pneumonia. There are also codes for gastrointestinal tularemia (A21.3), generalized tularemia (A21.7) which is widespread throughout the body (also called typhoidal tularemia), and other or unspecified forms (A21.8, A21.9). Recognizing synonyms like glandular tularemia or infection caused by Francisella clarifies which code applies, supporting accurate diagnosis and documentation for healthcare providers and coders.
Questions About This Page
How many billable codes are in the A21 range?
Of the 8 codes in this range, 7 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 A21 range classify?
The range classifies tularemia. 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.
