Current
J4B — Pulmonary mycetoma
Part of Chapter 10: Diseases of the respiratory system , block Chronic lower respiratory diseases (J40-J4B) .
Official Notes
Child Codes
J4B has no child codes in the FY 2027 release -- it is used on its own.
Referenced By
Official notes on these codes cite J4B.
FY 2027 effective October 1, 2026 · CDC NCHS and CMS