ICD-10-CM 2027
ICD-10 code for lung fistula
From the official ICD-10-CM alphabetic index entry “Fistula (cutaneous) › lung”. Page updated September 29, 2026.
About coding lung fistula
The ICD-10-CM code for lung fistula is J86.0 (Pyothorax with fistula).
Within J86 (Pyothorax), J86.0 is specifically for Pyothorax with fistula. Related codes cover without fistula (J86.9).
Use an additional code (B95-B97) to identify infectious agent.
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about lung fistula ICD-10 codes
What is the ICD-10 code for lung fistula?
- J86.0 — Pyothorax with fistula.
Is J86.0 billable?
- Yes. J86.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J86.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J86.0 as a principal diagnosis.
Is J86.0 a CC or MCC?
- J86.0 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.