ICD-10-CM › J00-J99 › J40-J4B › J4A Chronic lung allograft dysfunction › J4A.9

Valid for claims with a date of service in the current code year.

Valid FY2024 onwards.

What has happened to this code

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from J4A Chronic lung allograft dysfunction

Code first

• , if applicable:
• 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

• , if applicable, bronchiolitis obliterans syndrome (J44.81)

Inherited from the J40-J4B section Chronic lower respiratory diseases (J40-J4B)

Excludes1 - never coded here

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

Excludes2 - not included here

• cystic fibrosis (E84.-)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

• CLAD
• Malfunction
• Dysfunction > chronic > lung allograft

Codes in the same group

Code	Description	Status
J4A.0	Restrictive allograft syndrome	Valid
J4A.8	Other chronic lung allograft dysfunction	Valid