J4A

ICD-10Non-billable category

Chronic lung allograft dysfunction

Official ICD-10-CM descriptor (FY2026)

Chronic lung allograft dysfunction

J4A is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Code first

Sequence the underlying condition before this code.

  • , 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

Two codes may be needed; sequencing depends on the reason for the encounter.

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

More specific codes under J4A

Where this code sits

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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