J4A — Chronic lung allograft dysfunction
Is J4A billable?
No — J4A is a non-billable header code. J4A groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath J4A.
J4A at a glance
| Code | J4A |
|---|---|
| Description | Chronic lung allograft dysfunction |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Code first
The underlying condition below must be sequenced before J4A. J4A describes a manifestation and cannot be the principal or first-listed diagnosis.
Code also
Two codes may be needed to describe the condition fully. Whether J4A is sequenced first depends on the reason for the encounter.
- , if applicable, bronchiolitis obliterans syndrome (J44.81)
Excludes1 — never code together — inherited from J40-J4B
The conditions below can never be reported together with J4A on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- bronchitis due to chemicals, gases, fumes and vapors (J68.0)
Use additional code — inherited from Chapter 10
Report an additional code alongside J4A to fully describe the condition. J4A is sequenced first.
Excludes2 — not included here — inherited from Chapter 10
The conditions below are not part of J4A, but a patient may have both at the same time. When documentation supports it, J4A and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- smoke inhalation (T59.81-)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Excludes2 — not included here — inherited from J40-J4B
The conditions below are not part of J4A, but a patient may have both at the same time. When documentation supports it, J4A and the excluded code may both be reported.
- cystic fibrosis (E84.-)
What codes fall under J4A? (3)
How long has J4A existed?
J4A first appears in FY2024.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.