ICD-10 Code B39.0 – Acute pulmonary histoplasmosis capsulati (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B39.0 – Acute pulmonary histoplasmosis capsulati
What it is
Acute pulmonary histoplasmosis capsulati is a fungal infection of the lungs caused by Histoplasma capsulatum. Use this code when documentation identifies an acute lung infection from this organism.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include cough, fever, chest discomfort, and shortness of breath after exposure in an endemic area.
When to use this code
Use B39.0 when the provider documents acute pulmonary histoplasmosis, histoplasma pneumonia, or acute lung disease due to Histoplasma capsulatum. Confirm the pulmonary involvement is acute and infection-related, not a prior history or another site of disease.
Do not use for
Do not use this code for chronic pulmonary histoplasmosis, disseminated histoplasmosis, or nonspecific fungal pneumonia without documented Histoplasma capsulatum. Check documentation if the site or acuity is unclear.
Coding tip
Code only when the record clearly links the lung infection to Histoplasma capsulatum and specifies an acute pulmonary presentation.