Primary coccidioidomycosis (pulmonary)

This code identifies the initial, acute infection of coccidioidomycosis primarily affecting the lungs. It represents the symptomatic presentation of Valley Fever, caused by the Coccidioides fungus, when the respiratory system is the main site of involvement.

Assign this code when documentation confirms a new diagnosis of coccidioidomycosis with pulmonary manifestations, such as pneumonia, cough, fever, or chest pain, without evidence of dissemination. Supporting documentation includes positive fungal cultures, serology (e.g., IgM antibodies), or histopathology from lung tissue.

• Do not use for chronic or disseminated forms of coccidioidomycosis; specific codes exist for those presentations.
• Ensure documentation clearly states "primary" or "acute" pulmonary involvement to differentiate from other forms.
• Consider sequencing with codes for specific pulmonary manifestations (e.g., pneumonia) if applicable, following coding guidelines.