2026 ICD-10-CM Diagnosis Code A28Other zoonotic bacterial diseases, not elsewhere classified

ICD-10-CM Codes›A00–B99›A20-A28›A28

ICD-10-CM A28
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A28 is a non-billable ICD-10-CM category code for other zoonotic bacterial diseases, not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A28.0, A28.1, A28.2, and A28.8.

Code Identity

ICD-10-CM Code
A28
Billable Status
No — Non-Billable Category
Code Describes
Other zoonotic bacterial diseases, not elsewhere classified
Chapter
A20-A28
Certain zoonotic bacterial diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA20-A28Certain zoonotic bacterial diseases
CategoryA28Other zoonotic bacterial diseases, not elsewhere classified
This CodeA28Other zoonotic bacterial diseases, not elsewhere classified

Specific Coding for Other zoonotic bacterial diseases, not elsewhere classifiedOverview

Non-specific codes like A28 require more characters. Use one of these billable codes instead:

  • Use A28.0 for Pasteurellosis

  • Use A28.1 for Cat-scratch disease

  • Use A28.2 for Extraintestinal yersiniosis

  • Use A28.8 for Other specified zoonotic bacterial diseases, not elsewhere classified

  • Use A28.9 for Zoonotic bacterial disease, unspecified

Patient EducationClinical

Bacterial Infections

Bacteria are tiny organisms (living things) that have only one cell. Under a microscope, they look like balls, rods, or spirals. They can be found almost everywhere on Earth. There are lots of bacteria in and on your body. In fact, your body has about 10 times more bacteria cells than human cells.

The full article covers:

  • What are bacteria?
  • How do bacterial infections spread?
  • What are the treatments for bacterial infections?
  • Can bacterial infections be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A28Overview

Is A28 (Other zoonotic bacterial diseases, not elsewhere classified) a billable code?

No. This is a category header that groups the codes for other zoonotic bacterial diseases, not elsewhere classified, and headers cannot be submitted on claims. Claims for other zoonotic bacterial diseases, not elsewhere classified need a more specific code from this category, such as A28.0, A28.1, and A28.2.