ICD-10 Code B48.4 – Penicillosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B48.4 – Penicillosis
What it is
Penicillosis is a fungal infection caused by Penicillium species. Use this code when the record documents this specific mycosis, not a nonspecific fungal infection.
Clinical signs
Clinical features vary; refer to documentation. Reported findings may include localized or systemic fungal disease, but the diagnosis should be supported by clinician documentation, culture, pathology, or other accepted evidence.
When to use this code
Use B48.4 when the provider specifically documents penicillosis or infection due to Penicillium species. It may also apply when the chart clearly identifies this organism as the cause of disease. If the organism is not specified, check documentation before assigning this code.
Do not use for
Do not use this code for unspecified fungal infections or for infections caused by other molds or yeasts. If the record only says “fungal infection,” you need more detail.
Coding tip
Code B48.4 only when the organism is named; otherwise, query the provider for clarification.