Pulmonary mucormycosis

This code identifies a severe fungal infection of the lungs caused by molds from the order Mucorales. This opportunistic infection primarily affects immunocompromised individuals, leading to rapid tissue necrosis, angioinvasion, and often a poor prognosis.

Apply this code when documentation confirms a diagnosis of mucormycosis specifically affecting the pulmonary system. This diagnosis is typically supported by histopathological findings from lung tissue biopsies, positive fungal cultures, or characteristic imaging findings in a susceptible patient.

• Differentiate from other fungal pneumonias; ensure the documentation explicitly states "mucormycosis" and specifies the pulmonary site.
• Always code any underlying immunocompromised state (e.g., diabetes mellitus, malignancy, transplant status) as a primary or secondary diagnosis.
• Avoid using this code for mucormycosis affecting other body sites; site-specific codes exist for rhinocerebral, cutaneous, or disseminated forms.