Chronic lung allograft dysfunction (J4A) ICD-10-CM
The J4A code range covers chronic lung allograft dysfunction with 4 ICD-10-CM diagnosis codes. 3 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- , 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
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
- , if applicable, bronchiolitis obliterans syndrome J44.81
Codes in the J4A Range 4 codes · 3 billable
About the J4A Code Range
Chronic lung allograft dysfunction means a transplanted lung has a lasting problem with how it works.
J4A separates restrictive allograft syndrome (J4A.0) from other chronic lung allograft dysfunction (J4A.8) and unspecified chronic lung allograft dysfunction (J4A.9).
Questions About This Page
How many billable codes are in the J4A range?
Of the 4 codes in this range, 3 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the J4A range classify?
The range classifies chronic lung allograft dysfunction. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
