B40.3 Cutaneous blastomycosis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from B40 Blastomycosis

Excludes1 (never code together)

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

MS-DRG index

Defines the logic of DRG(s) 791 in MDC 15.

Approximate ICD-9-CM (GEMs)

• 116.0 Blastomycosis (approximate)

Code annotations containing back-references to B40.3

Back-references to B40

• Code First: M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere ("mycoses (B35-B49)")

Diagnosis Index entries for B40.3

• Blastomycosis, blastomycotic › cutaneous
• Blastomycosis, blastomycotic › skin
• Dermatitis (eczematous) › blastomycotic

Nearby codes

• B40 Blastomycosis
• B40.0 Acute pulmonary blastomycosis
• B40.1 Chronic pulmonary blastomycosis
• B40.2 Pulmonary blastomycosis, unspecified
• B40.3 Cutaneous blastomycosis (this code)
• B40.7 Disseminated blastomycosis
• B40.8 Other forms of blastomycosis
• B40.81 Blastomycotic meningoencephalitis
• B40.89 Other forms of blastomycosis
• B40.9 Blastomycosis, unspecified