2026 ICD-10-CM Diagnosis Code A44Bartonellosis

ICD-10-CM Codes›A00–B99›A30-A49›A44

ICD-10-CM A44
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A44 is a non-billable ICD-10-CM category code for bartonellosis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A44.0, A44.1, A44.8, and A44.9.

Code Identity

ICD-10-CM Code
A44
Billable Status
No — Non-Billable Category
Code Describes
Bartonellosis
Chapter
A30-A49
Other bacterial diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA30-A49Other bacterial diseases
CategoryA44Bartonellosis
This CodeA44Bartonellosis

Specific Coding for BartonellosisOverview

Non-specific codes like A44 require more characters. Use one of these billable codes instead:

  • Use A44.0 for Systemic bartonellosis

  • Use A44.1 for Cutaneous and mucocutaneous bartonellosis

  • Use A44.8 for Other forms of bartonellosis

  • Use A44.9 for Bartonellosis, 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 A44Overview

Is A44 (Bartonellosis) a billable code?

No. This is a category header that groups the codes for bartonellosis, and headers cannot be submitted on claims. Claims for bartonellosis need a more specific code from this category, such as A44.0, A44.1, and A44.8.