ICD-10 Code B38.9 – Coccidioidomycosis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B38.9 – Coccidioidomycosis, unspecified
What it is
B38.9 identifies coccidioidomycosis when the provider documents the infection but does not specify the site or clinical form. Use it for Valley fever cases that are not further classified.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include respiratory symptoms, fever, fatigue, cough, or chest discomfort, but the record must support the diagnosis and not a different specified form.
When to use this code
Use B38.9 when the chart states coccidioidomycosis, coccidioidal infection, or Valley fever without a more specific type or site. It also fits when the clinician confirms the disease but does not document pulmonary, meningeal, cutaneous, or disseminated involvement.
If later notes identify a specific manifestation, code that more precise diagnosis instead. Check documentation when the record is unclear or when the infection is only suspected.
Do not use for
Do not use B38.9 for a specified form of coccidioidomycosis, such as pulmonary or meningitis involvement. Also avoid it when the diagnosis is only ruled out or not confirmed.
Coding tip
Look for the exact wording in the assessment; if the provider names a site or manifestation, choose the more specific code.