Certain zoonotic bacterial diseases (A20-A28) ICD-10-CM
The A20–A28 section covers certain zoonotic bacterial diseases with 57 ICD-10-CM diagnosis codes, of which 47 are billable in fiscal year 2027. The section is organized into the 9 code ranges listed below.
Code Ranges in This Section 9 ranges · 57 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the A20–A28 Code Range
These bacterial diseases include infections involving animals and people, such as plague, anthrax, and rat-bite fever.
The categories separate the diseases by name. A20 groups forms of plague, while A21 groups forms of tularemia by the parts of the body involved. A22 separates anthrax affecting the skin, lungs, or digestive tract. A23 distinguishes brucellosis by the Brucella species causing it. A24 separates glanders from melioidosis, with further distinctions among forms of melioidosis. A25 distinguishes named forms of rat-bite fever. A26 groups forms of erysipeloid, and A27 groups forms of leptospirosis. A28 contains other zoonotic bacterial diseases, including cat-scratch disease.
Questions About This Page
How many codes are in the A20-A28 range?
The A20-A28 range contains 57 ICD-10-CM diagnosis codes in FY 2027. 47 of them are billable, and the rest are category headers that organize the section.
What conditions does A20-A28 cover?
The range covers certain zoonotic bacterial diseases. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
