ICD-10 Code B36.8 – Other specified superficial mycoses (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B36.8 – Other specified superficial mycoses
What it is
B36.8 identifies a superficial fungal infection that does not fit a more specific ICD-10 category. It is used when the organism or presentation is documented as another specified superficial mycosis.
Clinical signs
Clinical features vary; refer to documentation. Superficial mycoses commonly affect the outer skin layers, hair, or nails and may cause discoloration, scaling, or mild itching.
When to use this code
Use B36.8 when the provider documents a superficial fungal infection that is specifically named but not classified elsewhere in the superficial mycoses group. It is appropriate when the record supports a non-dermatophyte, non-candidal, non-pityriasis diagnosis. If the note is vague, check documentation before assigning this code.
Do not use for
Do not use this code for tinea infections, candidiasis, or pityriasis versicolor when a more specific code applies. Avoid it if the chart only says “fungal infection” without further detail.
Coding tip
Code the most specific documented superficial mycosis first; reserve B36.8 for the remaining specified cases.