ICD-10 Code A23.3 – Brucellosis due to Brucella canis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A23.3 – Brucellosis due to Brucella canis
What it is
A23.3 identifies brucellosis caused by Brucella canis, a zoonotic bacterial infection usually linked to exposure to infected dogs or dog-related specimens. Use it when the documentation specifically names B. canis.
Clinical signs
Clinical features vary; refer to documentation. Brucellosis may present with fever, malaise, sweats, headache, and musculoskeletal complaints, but the record should support the specific organism and infection site.
When to use this code
Use A23.3 when the provider documents brucellosis due to Brucella canis, whether confirmed by culture, serology, or clear clinical diagnosis. It also applies when the note states canine exposure with B. canis infection. Do not infer the organism from nonspecific brucellosis alone.
Do not use for
Do not use this code for unspecified brucellosis or for infections due to other Brucella species. Check documentation if the organism is not identified or if the record only mentions exposure without confirmed disease.
Coding tip
Code the organism exactly as documented; if Brucella canis is not named, verify the chart before selecting A23.3.