Bartonellosis, unspecified

This code represents an infection caused by bacteria of the genus Bartonella when the specific species is not identified. Bartonellosis can manifest with a variety of symptoms, including fever, lymphadenopathy, and endocarditis, depending on the infecting species.

Use this code when a diagnosis of bartonellosis is confirmed, but the specific Bartonella species (e.g., B. henselae, B. quintana) has not been determined or documented. This often occurs when initial lab results indicate a Bartonella infection without further speciation, or when clinical suspicion is high but definitive identification is pending or unavailable.

• Avoid using this code if a more specific Bartonella species is documented; instead, use the appropriate specific code (e.g., for Cat-scratch disease).
• Ensure documentation clearly states "bartonellosis, unspecified" or "Bartonella infection, species unknown."
• Consider sequencing this code as the primary diagnosis if it is the reason for the encounter, followed by codes for any associated manifestations.