J4B
✓ Billable
Pulmonary mycetoma
ICD-10-CM · FY2026 · Diseases of the Respiratory System
Code
J4B
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Respiratory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Also known as
- Pulmonary fungal ball
Code also
- , if known, associated infection, such as:
- aspergillosis (B44.-)
- chronic pulmonary coccidioidomycosis (B38.1)
- pulmonary candidiasis (B37.1)
Frequently asked questions
What is ICD-10 code J4B?
ICD-10-CM code J4B represents Pulmonary mycetoma. It is a billable diagnosis code in the Diseases of the Respiratory System chapter, effective October 1, 2025 – September 30, 2026.
Is J4B billable?
Yes. J4B is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is J4B in?
J4B belongs to the Diseases of the Respiratory System chapter (J00–J99) of ICD-10-CM.
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