B40 ICD-10-CM Code: Blastomycosis
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
B40Blastomycosis
ICD-10-CM diagnosis code · United States clinical modification
Where B40 sits
- 1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
- 2
Section
Mycoses (B35-B49)
- 3
Category B40
Blastomycosis
- 4
Code B40
Blastomycosis
Codes under B40
B40 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for B40.
Code first
No “code first” instruction is listed for B40.
Use additional code
No “use additional code” instruction is listed for B40.
Excludes1
Conditions that should not be reported together with this code.
- Brazilian blastomycosis (B41.-)
- keloidal blastomycosis (B48.0)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for B40.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code B40 mean?
B40 is the FY 2027 U.S. ICD-10-CM code for “Blastomycosis.”
Is B40 a billable or specific ICD-10-CM code?
No. B40 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is B40 located in ICD-10-CM?
B40 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Mycoses (B35-B49) (B35–B49), under category B40, Blastomycosis.
What coding notes are listed for B40?
No inclusion terms are listed for B40 in this reference record. No code-first instruction is listed. Excludes1 notes: Brazilian blastomycosis (B41.-); keloidal blastomycosis (B48.0). No Excludes2 note is listed.