ICD-10 Code B38.1 – Chronic pulmonary coccidioidomycosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B38.1 – Chronic pulmonary coccidioidomycosis
What it is
This code identifies a long-lasting Coccidioides infection affecting the lungs. It is used when the pulmonary disease is chronic rather than an acute or unspecified form.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include persistent cough, chest discomfort, fatigue, or abnormal chest imaging consistent with chronic pulmonary infection.
When to use this code
Use B38.1 when the provider documents chronic pulmonary coccidioidomycosis, chronic Valley fever involving the lungs, or a persistent pulmonary fungal infection due to Coccidioides. Code only when the record supports chronic lung involvement. Check documentation if the site or chronicity is unclear.
Do not use for
Do not use this code for acute coccidioidomycosis, unspecified coccidioidomycosis, or nonpulmonary disease without lung involvement. If the chart does not confirm chronic pulmonary disease, check documentation.
Coding tip
Look for the words “chronic” and “pulmonary” in the provider note before assigning B38.1.