Ornithosis with pneumonia

This code signifies a bacterial infection caused by Chlamydophila psittaci, primarily transmitted from birds to humans, specifically when the infection has progressed to involve the lungs, manifesting as pneumonia. It describes a systemic illness with a prominent respiratory component.

Use this code when documentation confirms a diagnosis of ornithosis (psittacosis) and explicitly states the presence of pneumonia as a complication or manifestation of the infection. Supporting documentation would include laboratory confirmation of Chlamydophila psittaci and clinical findings consistent with pneumonia.

• Ensure the documentation clearly links the pneumonia to the ornithosis; do not assume causation.
• Do not use this code for ornithosis without pulmonary involvement; a different code would be appropriate for uncomplicated ornithosis.
• Consider any associated symptoms or complications for additional coding, such as myocarditis or hepatitis, if documented.