Other zoonotic bacterial diseases, not elsewhere classified (A28) ICD-10-CM
The A28 code range covers other zoonotic bacterial diseases, not elsewhere classified with 6 ICD-10-CM diagnosis codes. 5 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 A28 Range 6 codes · 5 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A28 range.
Mesenteric Lymphadenitis
INFLAMMATION of LYMPH NODES in the MESENTERY.
About the A28 Code Range
ICD-10 code section A28 covers other zoonotic bacterial diseases not classified elsewhere, addressing infections transmitted from animals to humans that do not fit into more specific categories. This includes diseases like pasteurellosis, cat-scratch disease, extraintestinal yersiniosis, and several other less common bacterial zoonoses.
This section is essential for coding infections caused by bacteria transmitted from animals when they are not otherwise specified. For example, A28.0 corresponds to pasteurellosis, also known by synonyms such as cat-bite fever or infection by Pasteurella multocida, which arises often from cat or dog bites. A28.1 identifies cat-scratch disease, sometimes called cat scratch disease without a dash. Meanwhile, A28.2 refers to extraintestinal yersiniosis, which may present as Masshoff's syndrome or erythema nodosum due to Yersinia enterocolitica. Code A28.8 includes various specified zoonotic bacterial infections, such as actinobacillosis from different Actinobacillus species. For infections that do not meet specific criteria, A28.9 covers unspecified zoonotic bacterial diseases. Using these codes helps accurately capture and document animal-to-human bacterial infections beyond commonly classified conditions.
Questions About This Page
How many billable codes are in the A28 range?
Of the 6 codes in this range, 5 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 A28 range classify?
The range classifies other zoonotic bacterial diseases, not elsewhere classified. 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.
