ICD-10 Code for Blastomycosis

The default ICD-10-CM 2027 code for blastomycosis, blastomycotic is B40.9 – Blastomycosis, unspecified. More specific codes depend on the details documented, as listed in the official index (8 codes, 8 billable).

Main code: B40.9 – Blastomycosis, unspecified
Billable: Yes

Index entries for Blastomycosis

Brazilian – see Paracoccidioidomycosis
cutaneous – B40.3
disseminated – B40.7
European – see Cryptococcosis
generalized – B40.7
keloidal – B48.0
North American – B40.9
primary pulmonary – B40.0
pulmonary – B40.2
- acute – B40.0
- chronic – B40.1
skin – B40.3
South American – see Paracoccidioidomycosis
specified NEC – B40.89

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.