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

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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