Anthrax (A22) ICD-10-CM
The A22 code range covers anthrax with 7 ICD-10-CM diagnosis codes. 6 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.
- infection due to Bacillus anthracis
Codes in the A22 Range 7 codes · 6 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A22 range.
Anthrax
An acute infection caused by the spore-forming bacteria BACILLUS ANTHRACIS. It commonly affects hoofed animals such as sheep and goats. Infection in humans often involves the skin (cutaneous anthrax), the lungs (inhalation anthrax), or the gastrointestinal tract. Anthrax is not contagious and can be treated with antibiotics.
Anthrax Vaccines
Vaccines or candidate vaccines used to prevent ANTHRAX.
Bacillus anthracis
A species of bacteria that causes ANTHRAX in humans and animals.
About the A22 Code Range
ICD-10 code A22 covers various forms of anthrax, a bacterial infection caused by Bacillus anthracis. These codes specify the infection's type and location, such as cutaneous, pulmonary, gastrointestinal, or septic manifestations.
This section is used to document and classify different presentations of anthrax for accurate diagnosis and treatment tracking. For example, A22.0 refers to cutaneous anthrax, also known as skin eschar or crust on the skin. A22.1 is for pulmonary anthrax, sometimes called inhalational anthrax or anthrax pneumonia. When the infection affects the intestinal tract, A22.2 applies. A22.7 identifies anthrax-related sepsis, and A22.8 includes other less common forms, such as meningitis caused by Bacillus anthracis. If the type isn’t specified, A22.9 is assigned. Using these specific ICD-10 codes for anthrax ensures clear communication of the infection's exact nature, aiding both healthcare providers and medical coders in managing care and reporting.
Questions About This Page
How many billable codes are in the A22 range?
Of the 7 codes in this range, 6 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 A22 range classify?
The range classifies anthrax. 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.
