J4A.0 – Restrictive allograft syndrome

ICD-10-CM 2027 diagnosis code · Chronic lower respiratory diseases

Billable code

ICD-10-CM code J4A.0

Code: J4A.0 (claims format: J4A0)
Description: Restrictive allograft syndrome
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 10. Diseases of the respiratory system (J00-J99)
Block: J40-J4B Chronic lower respiratory diseases
Parent codes: J4A

Notes for J4A.0

Code also:

, if applicable, for mixed chronic lung allograft dysfunction, bronchiolitis obliterans syndrome (J44.81)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

J4A – Chronic lung allograft dysfunction

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)

Block J40-J4B

Excludes1 (not coded here):

bronchitis due to chemicals, gases, fumes and vapors (J68.0)

Excludes2 (not included here):

cystic fibrosis (E84.-)

Index terms for J4A.0

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in J4A

Frequently asked questions

What is ICD-10 code J4A.0?

J4A.0 is the ICD-10-CM code for restrictive allograft syndrome, in the block J40-J4B (Chronic lower respiratory diseases).

Is J4A.0 a billable code?

Yes. J4A.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does J4A.0 belong to?

It belongs to category J4A – Chronic lung allograft dysfunction.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.