ICD-10 Code B48.8 – Other specified mycoses (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B48.8 – Other specified mycoses
What it is
B48.8 identifies a fungal infection that does not fit a more specific mycosis code. Use it when documentation names an unusual or otherwise specified fungal disease.
Clinical signs
Clinical features vary by fungus and site of infection. You may see localized inflammation, skin or mucosal lesions, respiratory findings, or systemic illness; refer to documentation.
When to use this code
Use B48.8 when the provider documents a mycosis that is specified but not listed elsewhere in ICD-10-CM. It is appropriate when the organism or clinical syndrome is clear, yet no more specific code matches. Check the record for the exact fungal diagnosis and anatomic site.
Do not use for
Do not use this code for common fungal infections that have their own ICD-10-CM codes, such as candidiasis or dermatophyte infections. Also avoid it when the documentation is nonspecific; check documentation.
Coding tip
Code the most specific fungal diagnosis available, and use B48.8 only when no other mycosis code applies.