Systemic bartonellosis

This code represents a systemic infection caused by bacteria of the genus Bartonella. These infections can manifest with a variety of symptoms affecting multiple organ systems, including fever, fatigue, lymphadenopathy, and endocarditis. The specific clinical presentation depends on the Bartonella species involved and the host's immune status.

Use this code when documentation confirms a systemic infection due to Bartonella species, such as Bartonella henselae (cat scratch disease), Bartonella quintana (trench fever), or Bartonella bacilliformis (Carrion's disease). Supporting documentation should include positive serology, PCR, or culture results, along with clinical signs and symptoms indicative of systemic involvement.

• Do not use this code for localized bartonellosis, such as uncomplicated cat scratch disease without systemic manifestations.
• Code any associated manifestations, such as endocarditis (I33.0), osteomyelitis (M86.-), or encephalopathy (G93.40), as additional diagnoses.
• Ensure the documentation specifies "systemic" involvement to differentiate from localized Bartonella infections.