ICD-10-CM 2027
ICD-10 code for bronchiolitis obliterans syndrome
From the official ICD-10-CM alphabetic index entry “Syndrome › bronchiolitis obliterans”. Page updated September 29, 2026.
About coding bronchiolitis obliterans syndrome
The ICD-10-CM code for bronchiolitis obliterans syndrome is J44.81 (Bronchiolitis obliterans and bronchiolitis obliterans syndrome).
Within J44.8 (other specified chronic obstructive pulmonary disease), J44.81 is specifically for bronchiolitis obliterans and bronchiolitis obliterans syndrome. Related codes cover other specified chronic obstructive pulmonary disease (J44.89).
Code first , if applicable: complication of bone marrow transplant (T86.09), complication of stem cell transplant (T86.5), heart-lung transplant rejection (T86.31), lung transplant rejection (T86.810) and 2 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about bronchiolitis obliterans syndrome ICD-10 codes
What is the ICD-10 code for bronchiolitis obliterans syndrome?
- J44.81 — Bronchiolitis obliterans and bronchiolitis obliterans syndrome.
Is J44.81 billable?
- Yes. J44.81 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J44.81 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J44.81 as a principal diagnosis.
Is J44.81 a CC or MCC?
- No. J44.81 is neither a CC nor an MCC under MS-DRG v44.0.