J4B Pulmonary mycetoma

Billable

Block: Chronic lower respiratory diseases (J40-J4B)

Includes

  • Pulmonary fungal ball

Code Also

  • , if known, associated infection, such as:
  • aspergillosis (B44.-)
  • chronic pulmonary coccidioidomycosis (B38.1)
  • pulmonary candidiasis (B37.1)
This category is a complete, billable diagnosis code.

No additional specificity is required — submit J4B directly on claims and documentation without a subcode extension.

Last reviewed: September 2026