Coding notes
From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Also covers
- Dermatophytic onychia
- Dermatophytosis of nail
- Onychomycosis
- Ringworm of nails
Includes
- favus
- infections due to species of Epidermophyton, Micro-sporum and Trichophyton
- tinea, any type except those in B36.-
Excludes2
Not part of this code, but both can be coded when both are documented.
- hypersensitivity pneumonitis due to organic dust (J67.-)
- mycosis fungoides (C84.0-)
Related codes
Common questions
Is B35.1 a billable code?
Yes. B35.1 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.