ICD-10 Code B38.3 – Cutaneous coccidioidomycosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B38.3 – Cutaneous coccidioidomycosis
What it is
This code identifies coccidioidomycosis involving the skin. Use it when the infection is documented as cutaneous, meaning the disease has spread to or is limited to skin findings.
Clinical signs
Clinical features vary; refer to documentation. Skin involvement may appear as lesions, nodules, ulcers, or other inflammatory changes noted by the clinician, often in the setting of proven coccidioidomycosis.
When to use this code
Use B38.3 when the record specifically states cutaneous coccidioidomycosis or skin involvement from coccidioidal infection. You should also use it when the provider links a documented skin lesion to coccidioidomycosis.
Do not infer skin involvement from a general history of valley fever alone. If the note only says coccidioidomycosis without site, check documentation for the affected body system.
Do not use for
Do not use this code for nonspecific rashes, fungal skin infections, or coccidioidomycosis without documented cutaneous involvement. Check documentation if the site is unclear.
Coding tip
Code the specific manifestation only when the provider clearly documents skin involvement and its relationship to coccidioidomycosis.