Is ICD-10-CM code J4A billable?

No, J4A (Chronic lung allograft dysfunction) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code J4A belong to?

J4A belongs to Chapter 10 of the ICD-10-CM tabular list: J00–J99 (Diseases of the Respiratory System).

J4ANon-billable

Chronic lung allograft dysfunction

Diseases of the Respiratory System·Chronic lower respiratory diseases (J40-J4B)·category·FY 2027

3 billable codes under J4A: none are a CC or MCC; all map to HCC 276 (Lung Transplant Status/Complications).An HCC counts toward a Medicare Advantage patient's risk score.

Instructional notes

Code first: code the underlying condition first, then 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: add a code for this too, order depends on the encounter

if applicable, bronchiolitis obliterans syndrome (J44.81)

Also applies, from Chronic lower respiratory diseases (J40-J4B)

These notes sit on J40-J4B and apply to every code under it, including J4A.

Excludes1: not coded here, use a different code

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

Excludes2: not included here, code separately if applicable

cystic fibrosis (E84.-)

All codes under J4A

J4A can't be used on a claim. Pick a billable code below; grey headings group them.

MS-DRGs

As the principal diagnosis, all 3 billable codes under J4A group to these MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Codes whose notes mention J4A

If you are coding one of these, its note tells you to add J4A too (Code Also, Use Additional Code), code it first (Code First), or not use it together (Excludes1).

J44.81 Code Also: chronic lung allograft dysfunction (J4A.-)