J4A.9 — Chronic lung allograft dysfunction, unspecified
Is J4A.9 billable?
Yes, but J4A.9 is an unspecified code. J4A.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, J4A.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting J4A.9 — the more specific alternatives are listed below.
More specific alternatives
J4A.9 at a glance
| Code | J4A.9 |
|---|---|
| Description | Chronic lung allograft dysfunction, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does J4A.9 group to?
J4A.9 sits in MDC 04 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 190Chronic Obstructive Pulmonary Disease with MCCmedical
- 191Chronic Obstructive Pulmonary Disease with CCmedical
- 192Chronic Obstructive Pulmonary Disease without CC/MCCmedical
How is J4A.9 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to J4A.9. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Dysfunction › chronic › lung allograft
Excludes1 — never code together — inherited from J40-J4B
The conditions below can never be reported together with J4A.9 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)
Code first — inherited from J4A
The underlying condition below must be sequenced before J4A.9. J4A.9 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 10
Report an additional code alongside J4A.9 to fully describe the condition. J4A.9 is sequenced first.
Excludes2 — not included here — inherited from Chapter 10
The conditions below are not part of J4A.9, but a patient may have both at the same time. When documentation supports it, J4A.9 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.9, but a patient may have both at the same time. When documentation supports it, J4A.9 and the excluded code may both be reported.
- cystic fibrosis (E84.-)
Code also — inherited from J4A
Two codes may be needed to describe the condition fully. Whether J4A.9 is sequenced first depends on the reason for the encounter.
- , if applicable, bronchiolitis obliterans syndrome (J44.81)
How long has J4A.9 existed?
J4A.9 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.