Q fever

This code represents Q fever, an infectious disease caused by the bacterium Coxiella burnetii. It is a zoonotic infection typically transmitted to humans through inhalation of aerosols from infected animals, leading to a range of clinical presentations from asymptomatic to severe pneumonia or chronic endocarditis.

Use this code when documentation confirms a diagnosis of Q fever, either acute or chronic. This includes cases where the patient presents with flu-like symptoms, pneumonia, hepatitis, or endocarditis, and laboratory tests (e.g., serology, PCR) confirm Coxiella burnetii infection.

• Ensure documentation specifies Q fever and not another rickettsial infection.
• Do not confuse with other atypical pneumonias unless Q fever is specifically diagnosed.
• Code any associated manifestations (e.g., pneumonia, hepatitis, endocarditis) as additional diagnoses.