2026 ICD-10-CM Diagnosis Code A48Other bacterial diseases, not elsewhere classified

ICD-10-CM Codes›A00–B99›A30-A49›A48

ICD-10-CM A48
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A48 is a non-billable ICD-10-CM category code for other bacterial diseases, not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A48.0, A48.1, A48.2, and A48.3.

Code Identity

ICD-10-CM Code
A48
Billable Status
No — Non-Billable Category
Code Describes
Other bacterial diseases, not elsewhere classified
Chapter
A30-A49
Other bacterial diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA30-A49Other bacterial diseases
CategoryA48Other bacterial diseases, not elsewhere classified
This CodeA48Other bacterial diseases, not elsewhere classified

Specific Coding for Other bacterial diseases, not elsewhere classifiedOverview

Non-specific codes like A48 require more characters. Use one of these billable codes instead:

  • Use A48.0 for Gas gangrene

  • Use A48.1 for Legionnaires' disease

  • Use A48.2 for Nonpneumonic Legionnaires' disease [Pontiac fever]

  • Use A48.3 for Toxic shock syndrome

  • Use A48.4 for Brazilian purpuric fever

  • A48.5 for Other specified botulism

  • Use A48.51 for Infant botulism

  • Use A48.52 for Wound botulism

  • Use A48.8 for Other specified bacterial diseases

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

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 A48Overview

Is A48 (Other bacterial diseases, not elsewhere classified) a billable code?

No. This is a category header that groups the codes for other bacterial diseases, not elsewhere classified, and headers cannot be submitted on claims. Claims for other bacterial diseases, not elsewhere classified need a more specific code from this category, such as A48.0, A48.1, and A48.2.