2027 ICD-10-CM Diagnosis Code A44Bartonellosis

ICD-10-CM Codes›A00–B99›A30-A49›A44

ICD-10-CM A44
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Bartonellosis
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A44: its own notes plus those printed at Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Clinical InformationClinical

  • Bartonella Infections

    infections by the genus bartonella. bartonella bacilliformis can cause acute febrile anemia, designated oroya fever, and a benign skin eruption, called verruga peruana. bartonella quintana causes trench fever, while bartonella henselae is the etiologic agent of bacillary angiomatosis (angiomatosis, bacillary) and is also one of the causes of cat-scratch disease.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About A44Overview

What is the ICD-10 code for bartonellosis?

A44 is the ICD-10-CM category for bartonellosis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.