ICD-10-CM 2027
ICD-10 code for restrictive allograft syndrome
From the official ICD-10-CM alphabetic index entry “Syndrome › restrictive allograft”. Page updated September 29, 2026.
About coding restrictive allograft syndrome
The ICD-10-CM code for restrictive allograft syndrome is J4A.0 (Restrictive allograft syndrome).
Within J4A (chronic lung allograft dysfunction), J4A.0 is specifically for restrictive allograft syndrome. Related codes cover other chronic lung allograft dysfunction (J4A.8) and unspecified (J4A.9).
Code first , if applicable: heart-lung transplant rejection (T86.31), lung transplant rejection (T86.810), other complications of heart-lung transplant (T86.39) and other complications of lung transplant (T86.818).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about restrictive allograft syndrome ICD-10 codes
What is the ICD-10 code for restrictive allograft syndrome?
- J4A.0 — Restrictive allograft syndrome.
Is J4A.0 billable?
- Yes. J4A.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J4A.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J4A.0 as a principal diagnosis.
Is J4A.0 a CC or MCC?
- No. J4A.0 is neither a CC nor an MCC under MS-DRG v44.0.