ICD-10 Code B40.2 – Pulmonary blastomycosis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B40.2 – Pulmonary blastomycosis, unspecified
What it is
B40.2 identifies pulmonary blastomycosis when the infection is in the lungs but the record does not specify a more detailed form. Use it for Blastomyces infection affecting pulmonary tissue.
Clinical signs
Clinical features vary; refer to documentation. Pulmonary blastomycosis may present with cough, fever, chest pain, dyspnea, or pneumonia-like findings, but you should code only what is documented.
When to use this code
Use B40.2 when the provider documents blastomycosis involving the lungs and does not name another site or a more specific pulmonary form. It also fits when the note states pulmonary blastomycosis without further detail. Check documentation if dissemination or another organ site is mentioned.
Do not use for
Do not use this code for blastomycosis limited to a nonpulmonary site, or when the record specifies a different blastomycosis code. If the documentation is unclear, check documentation before assigning B40.2.
Coding tip
Code the documented site exactly; if the chart says “pulmonary” but gives no more detail, B40.2 is the appropriate unspecified pulmonary option.