ICD Code B35.9

ICD code B35.9 is a diagnosis for a fungal skin infection (dermatophytosis) where the specific type or location of the infection is not specified.

1. Presence of superficial fungal infection affecting the skin, hair, or nails

2. Clinical signs such as scaling, redness, itching, or ring-shaped lesions

3. Absence of clear identification of the specific dermatophyte species or anatomical site involved

4. Laboratory tests (e.g., KOH prep, fungal culture) may be inconclusive or not performed

5. No evidence of other specific dermatophytoses (e.g., tinea pedis, tinea corporis, tinea capitis)

6. Symptoms not attributable to other dermatological conditions

Relevant CPT codes that may be used to treat ICD code B35.9 include:

- 99201–99215 (Evaluation and Management services)

- 87801 (Infectious agent detection by nucleic acid, multiple organisms)

- 87081 (Culture, presumptive, pathogenic organisms, screening only)

- 88305 (Pathology examination of skin biopsy)

- 11102, 11103 (Tangential biopsy of skin)

- 11720, 11721 (Debridement of nail, if onychomycosis is suspected)

- 11900, 11901 (Injection, intralesional; up to and over 7 lesions)

- 96910 (Photochemotherapy, if indicated)

- 96372 (Therapeutic, prophylactic, or diagnostic injection)

CPT code selection should be based on the specific services rendered and clinical scenario.

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