Disseminated blastomycosis

This code identifies a systemic fungal infection caused by Blastomyces dermatitidis that has spread beyond the primary site of infection, typically the lungs. It indicates involvement of multiple organ systems, such as skin, bones, genitourinary tract, or central nervous system.

Apply this code when documentation confirms blastomycosis with evidence of dissemination to non-pulmonary sites. This diagnosis is supported by positive fungal cultures, histopathology showing characteristic broad-based budding yeasts from multiple affected organs, or serological tests in a patient with multi-system involvement.

• Ensure documentation clearly specifies "disseminated" or involvement of multiple non-pulmonary sites.
• Do not use this code for localized blastomycosis (e.g., pulmonary only, cutaneous only) without evidence of spread.
• Consider additional codes for specific manifestations or complications of the disseminated infection (e.g., osteomyelitis, meningitis).