J44.81 Bronchiolitis obliterans and bronchiolitis obliterans syndrome

Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

Also covers

• Obliterative bronchiolitis

Includes

• asthma with chronic obstructive pulmonary disease
• chronic asthmatic (obstructive) bronchitis
• chronic bronchitis with airway obstruction
• chronic bronchitis with emphysema
• chronic emphysematous bronchitis
• chronic obstructive asthma
• chronic obstructive bronchitis
• chronic obstructive tracheobronchitis

Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

• bronchitis due to chemicals, gases, fumes and vapors (J68.0)

Excludes2

Not part of this code, but both can be coded when both are documented.

• bronchiectasis (J47.-)
• chronic bronchitis NOS (J42)
• chronic simple and mucopurulent bronchitis (J41.-)
• chronic tracheitis (J42)
• chronic tracheobronchitis (J42)
• emphysema without chronic bronchitis (J43.-)
• cystic fibrosis (E84.-)

Code first

Code the underlying condition first, then this code.

• , 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)
• other complications of heart-lung transplant (T86.39)
• other complications of lung transplant (T86.818)

Code also

A second code may be needed. Sequencing depends on the encounter.

• , if applicable, associated conditions, such as:
• chronic graft-versus-host disease (D89.811)
• chronic lung allograft dysfunction (J4A.-)
• chronic respiratory conditions due to chemicals, gases, fumes and vapors (J68.4)
• type of asthma, if applicable (J45.-)