ICD-10 Code B41 – Paracoccidioidomycosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B41 – Paracoccidioidomycosis
What it is
B41 identifies paracoccidioidomycosis, a fungal infection caused by Paracoccidioides species. It usually affects the lungs first and may spread to other organs.
Clinical signs
Clinical features vary; refer to documentation. Common findings include chronic cough, fever, weight loss, skin or mucosal lesions, and enlarged lymph nodes in disseminated disease.
When to use this code
Use B41 when the provider documents paracoccidioidomycosis or infection due to Paracoccidioides. Code it for confirmed disease in pulmonary, mucocutaneous, or disseminated forms. If the record only suggests a fungal infection without confirmation, check documentation before assigning the code.
Do not use for
Do not use this code for other endemic mycoses, such as histoplasmosis or coccidioidomycosis. Avoid it when the diagnosis is only suspected or when documentation names a different fungal organism.
Coding tip
Look for the exact organism or diagnosis wording in the chart; if the species is not documented, check documentation.