B40Header code — not billable
Blastomycosis
- Chapter
- 1. Certain infectious and parasitic diseases
- Category
- B40
- Effective date
- October 1, 2026
Related codes in category B40
B40.0Acute pulmonary blastomycosisYesB40.1Chronic pulmonary blastomycosisYesB40.2Pulmonary blastomycosis, unspecifiedYesB40.3Cutaneous blastomycosisYesB40.7Disseminated blastomycosisYesB40.8Other forms of blastomycosisB40.81Blastomycotic meningoencephalitisYesB40.89Other forms of blastomycosisYesB40.9Blastomycosis, unspecifiedYes
Frequently asked questions
What is ICD-10 code B40?
B40 is an ICD-10-CM diagnosis code for Blastomycosis.
Is B40 a billable code?
No. B40 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is B40 in?
B40 falls under Chapter 1: Certain infectious and parasitic diseases.
When did B40 become effective?
B40 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to B40?
B40 belongs to category B40, which includes 9 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.