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B40

Non-billable

Blastomycosis

B40 is the ICD-10-CM code for Blastomycosis. It is a non-billable category code — use a more specific child code such as B40.0 for billing.

Status
Header (non-billable)
Chapter
A00-B99
Subcodes
7
Edition
FY2026

A00-B99 Certain infectious and parasitic diseases

What this means — in plain language

MedlinePlus · NIH

If you have ever had athlete's foot or a yeast infection , you can blame a fungus. A fungus is a primitive organism. Mushrooms, mold and mildew are examples. Fungi live in air, in soil, on plants and in water. Some live in the human body. Only about half of all types of fungi are harmful. Some fungi reproduce through tiny spores in the air. You can inhale the spores or they can land on you. As a result, fungal…

Read more about Fungal Infections at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • •Brazilian blastomycosis (B41.-)
  • •keloidal blastomycosis (B48.0)

Frequently asked questions

What is ICD-10 code B40?
B40 is the ICD-10-CM code for "Blastomycosis". It falls under A00-B99 Certain infectious and parasitic diseases.
Is B40 a billable code?
No — B40 is a non-billable header code. Use a more specific child code (such as B40.0) for billing.
What are the subcodes of B40?
B40 has 7 more specific child codes, including B40.0, B40.1, B40.2.
What is excluded from B40?
Excludes1 (not coded here): Brazilian blastomycosis (B41.-); keloidal blastomycosis (B48.0).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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