Other forms of blastomycosis

This code signifies blastomycosis infections that do not fit into the more specific categories of pulmonary, cutaneous, or disseminated forms. It represents atypical presentations or localized infections of Blastomyces dermatitidis that are not otherwise specified. These might include osteoarticular, genitourinary, or central nervous system blastomycosis when a more precise code is unavailable.

Use this code when documentation clearly indicates a diagnosis of blastomycosis, but the specific anatomical site or systemic involvement is not detailed enough for a more precise code, or when the infection affects an unusual site not covered by other specific B40 codes. This code is appropriate for blastomycosis affecting organs or systems other than the lungs or skin, or for disseminated forms where the primary site is not identified.

• Ensure documentation specifies blastomycosis and the affected site if known; if a more specific B40 subcategory applies (e.g., pulmonary, cutaneous), use that code instead.
• Always look for documentation of the specific organism (Blastomyces dermatitidis) or a confirmed diagnosis of blastomycosis.
• Consider sequencing this code after a code for the primary manifestation if applicable, or as the primary diagnosis if the "other" form is the main reason for the encounter.