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 2026, 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 (ICD-10 code J4A) refers to long-term complications affecting transplanted lung tissue. This code and its subcategories are used to document ongoing problems after lung transplant surgeries.
The ICD-10 code for chronic lung allograft dysfunction includes specific types such as J4A.0 (Restrictive allograft syndrome), which is a particular form of lung transplant complication causing lung restriction. Other variants are captured under J4A.8 (Other chronic lung allograft dysfunction), which covers additional chronic post-transplant lung issues not otherwise classified. When the exact type of dysfunction is not specified, J4A.9 is used. These codes help medical coders accurately report complications of lung transplants, ensuring clear identification of transplant-related diseases within respiratory and organ complication categories. Using the correct ICD-10 code for chronic lung allograft dysfunction supports precise medical coding and better tracking of post-transplant health outcomes.
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, 2025 through September 30, 2026. 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 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
