NPI Atlas

B40.8 – Other forms of blastomycosis

ICD-10-CM 2027 diagnosis code · Mycoses

Non-billable header

ICD-10-CM code B40.8

Code: B40.8 (claims format: B408)
Description: Other forms of blastomycosis
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: B35-B49 Mycoses
Parent codes: B40

Billable codes under B40.8

B40.8 is a header code and cannot be used on claims. Choose the most specific code:

B40.81 – Blastomycotic meningoencephalitisBillable
B40.89 – Other forms of blastomycosisBillable

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

B40 – Blastomycosis

Excludes1 (not coded here):

Brazilian blastomycosis (B41.-)
keloidal blastomycosis (B48.0)

Block B35-B49

Excludes2 (not included here):

hypersensitivity pneumonitis due to organic dust (J67.-)
mycosis fungoides (C84.0-)

Related codes in B40

B40.0 – Acute pulmonary blastomycosisBillable
B40.1 – Chronic pulmonary blastomycosisBillable
B40.2 – Pulmonary blastomycosis, unspecifiedBillable
B40.3 – Cutaneous blastomycosisBillable
B40.7 – Disseminated blastomycosisBillable
B40.9 – Blastomycosis, unspecifiedBillable

Frequently asked questions

What is ICD-10 code B40.8?

B40.8 is the ICD-10-CM code for other forms of blastomycosis, in the block B35-B49 (Mycoses).

Is B40.8 a billable code?

No. B40.8 is a header code with more specific child codes; report one of the billable codes listed above.

What category does B40.8 belong to?

It belongs to category B40 – Blastomycosis.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.