A23.9
Brucellosis, unspecified
Billable code
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
Inherited from A23Brucellosis
Includes
Malta fever Mediterranean fever undulant fever
Inherited from chapter 1Certain infectious and parasitic diseases
Includes
diseases generally recognized as communicable or transmissible
Excludes 1
certain localized infections - see body system-related chapters
Excludes 2
carrier or suspected carrier of infectious disease (Z22.-) 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 to identify resistance to antimicrobial drugs (Z16.-)
Official Guidelines for A23.9
FY 2026 ›I.C.1Chapter-specific guidanceChapter 1: Certain Infectious and Parasitic Diseases (A00-B99), U07.1, U09.9
Subsections
- I.C.1.aHuman Immunodeficiency Virus (HIV) Infections
- I.C.1.bInfectious agents as the cause of diseases classified to other chapters
- I.C.1.cInfections resistant to antibiotics
- I.C.1.dSepsis, Severe Sepsis, and Septic Shock Infections resistant to antibiotics
- I.C.1.eMethicillin Resistant Staphylococcus aureus (MRSA) Conditions
- I.C.1.fZika virus infections
- I.C.1.gCoronavirus infections
Find A23.9 in the alphabetic index
20 index paths lead to this code
- Brucellosis
- Brucellosis › dermatitis
- Brucellosis › sepsis
- Fever › Malta
- Fever › Mediterranean
- Infection, infected, infective › Brucella
- Sepsis › Brucella
- Disorder › tubulo-interstitial › brucellosis
- Pyelonephritis › in › brucellosis
- Spondylitis › in › brucellosis
- Nephritis, nephritic › tubulo-interstitial › due to › brucellosis
- Spondylitis › in › brucellosis › cervical region
- Spondylitis › in › brucellosis › cervicothoracic region
- Spondylitis › in › brucellosis › lumbar region
- Spondylitis › in › brucellosis › lumbosacral region
- Spondylitis › in › brucellosis › multiple sites
- Spondylitis › in › brucellosis › occipito-atlanto-axial region
- Spondylitis › in › brucellosis › sacrococcygeal region
- Spondylitis › in › brucellosis › thoracic region
- Spondylitis › in › brucellosis › thoracolumbar region