ICD-10-CM 2027
ICD-10 code for obliterative bronchiolitis
From the official ICD-10-CM alphabetic index entry “Bronchiolitis (acute) (infective) (subacute) › obliterative (chronic) (subacute)”. Page updated September 29, 2026.
About coding obliterative bronchiolitis
The ICD-10-CM code for obliterative bronchiolitis is J44.81 (Bronchiolitis obliterans and bronchiolitis obliterans syndrome). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on J44.81.
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.
More specific obliterative bronchiolitis codes (official index)
Common questions about obliterative bronchiolitis ICD-10 codes
What is the ICD-10 code for obliterative bronchiolitis?
- J44.81 — Bronchiolitis obliterans and bronchiolitis obliterans syndrome. More specific codes apply when the documentation supports them: J44.81, J44.81.
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.