J4A
⚠ Non-billable
Chronic lung allograft dysfunction
ICD-10-CM · FY2026 · Diseases of the Respiratory System
Code
J4A
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Respiratory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
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)
Frequently asked questions
What is ICD-10 code J4A?
ICD-10-CM code J4A represents Chronic lung allograft dysfunction. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Respiratory System chapter, effective October 1, 2025 – September 30, 2026.
Is J4A billable?
No. J4A is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is J4A in?
J4A belongs to the Diseases of the Respiratory System chapter (J00–J99) of ICD-10-CM.
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