Brucellosis (A23) ICD-10-CM
The A23 code range covers brucellosis with 7 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- Malta fever
- Mediterranean fever
- undulant fever
Codes in the A23 Range 7 codes · 6 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A23 range.
Brucellosis
Infection caused by bacteria of the genus BRUCELLA mainly involving the MONONUCLEAR PHAGOCYTE SYSTEM. This condition is characterized by fever, weakness, malaise, and weight loss.
Brucellosis, Bovine
A disease of cattle caused by bacteria of the genus BRUCELLA leading to abortion in late pregnancy. BRUCELLA ABORTUS is the primary infective agent.
About the A23 Code Range
The ICD-10 code A23 covers brucellosis, a bacterial infection caused by various Brucella species. This code section helps identify the specific type of Brucella infection based on the bacterial strain involved.
Brucellosis can result from infections by different Brucella bacteria, each with a unique ICD-10 code: A23.0 for Brucella melitensis, A23.1 for Brucella abortus, A23.2 for Brucella suis, and A23.3 for Brucella canis. These codes are essential for coding conditions such as Brucella melitensis spondylitis or miscarriage caused by Brucella abortus. The code A23.8 is used for other less common Brucella infections like those caused by Brucella ovis, while A23.9 designates unspecified brucellosis, which includes symptoms such as Brucella infection of the central nervous system or Brucellosis uveitis. Using the correct ICD-10 code for brucellosis ensures precise documentation of the bacterial type responsible for the infection, aiding effective clinical management and reporting.
Questions About This Page
How many billable codes are in the A23 range?
Of the 7 codes in this range, 6 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 A23 range classify?
The range classifies brucellosis. 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.
