ICD-10-CM
ICD-10 code for Blastomycosis: B40.9
The ICD-10-CM index points "Blastomycosis" to B40 (Blastomycosis), a header that is not billable. When nothing more specific is documented, the billable code is B40.9, Blastomycosis, unspecified.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
- B40.3cutaneous, Cutaneous blastomycosisBillable
- B40.7disseminated, Disseminated blastomycosisBillable
- B40.7generalized, Disseminated blastomycosisBillable
- B48.0keloidal, LobomycosisBillable
- B40.9North American, Blastomycosis, unspecifiedBillable
- B40.0primary pulmonary, Acute pulmonary blastomycosisBillable
- B40.2pulmonary, Pulmonary blastomycosis, unspecifiedBillable
- B40.3skin, Cutaneous blastomycosisBillable
- B40.89specified NEC, Other forms of blastomycosisBillable
More specific codes in B40
A header groups codes and is not billed. A billable code is one you can report.
- B40BlastomycosisHeader
- B40.0Acute pulmonary blastomycosisBillable
- B40.1Chronic pulmonary blastomycosisBillable
- B40.2Pulmonary blastomycosis, unspecifiedBillable
- B40.3Cutaneous blastomycosisBillable
- B40.7Disseminated blastomycosisBillable
- B40.8Other forms of blastomycosisHeader
- B40.81Blastomycotic meningoencephalitisBillable
- B40.89Other forms of blastomycosisBillable
- B40.9Blastomycosis, unspecifiedBillable
Excludes1
Excludes1 means these codes are not reported together.
From B40. A note on a category applies to every code under it.
Related conditions
Related pages
- B40.9 code detailsNotes, nearby codes, CMS-HCC group
- Category B40Every code under it
- Chapter 1Certain infectious and parasitic diseases
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Blastomycosis?
The ICD-10-CM index points "Blastomycosis" to B40 (Blastomycosis), a header that is not billable. When nothing more specific is documented, the billable code is B40.9, Blastomycosis, unspecified.
Is B40.9 billable?
Yes. B40.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to B40.9?
The CDC tabular list gives 2 Excludes1 notes (not coded together) for B40.9 and the categories above it. They are listed on this page.
What chapter is B40.9 in?
Chapter 1. Certain infectious and parasitic diseases.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.