ICD-10 Code B35.8 – Other dermatophytoses (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B35.8 – Other dermatophytoses
What it is
B35.8 identifies dermatophyte fungal infections that do not fit a more specific tinea category. Use it for documented skin, hair, or nail dermatophytosis when the site or type is not otherwise classified.
Clinical signs
Typical findings include a superficial fungal rash with scaling, itching, or ring-shaped lesions. Clinical features vary; refer to documentation, especially when the record does not specify tinea pedis, corporis, cruris, or capitis.
When to use this code
Use B35.8 when the clinician documents “other dermatophytosis,” “dermatophyte infection,” or a tinea infection that is not named more specifically. It also fits cases where the chart confirms a dermatophyte infection but does not identify the exact anatomic site or subtype.
Do not use for
Do not use this code when the record clearly names a more specific dermatophytosis, such as tinea pedis or tinea unguium. Also avoid it for non-dermatophyte fungal infections or nonspecific dermatitis.
Coding tip
Check the provider’s wording carefully; if the site or type is documented, code the more specific tinea diagnosis instead of B35.8.