2027 ICD-10-CM Diagnosis Code J4AChronic lung allograft dysfunction

ICD-10-CM Codes›J00–J99›J40-J4B›J4A

ICD-10-CM J4A
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

J4A is a non-billable ICD-10-CM category code for chronic lung allograft dysfunction, so it cannot be submitted on claims. Use a more specific code from this category instead, such as J4A.0, J4A.8, and J4A.9.

Code Identity

ICD-10-CM Code
J4A
Billable Status
No — Non-Billable Category
Code Describes
Chronic lung allograft dysfunction
Short Description
Chronic lung allograft dysfunction
Same as the full description in the CMS dataset.
Chapter
J40-J4B
Chronic lower respiratory diseases

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ40-J4BChronic lower respiratory diseases
CategoryJ4AChronic lung allograft dysfunction
This CodeJ4AChronic lung allograft dysfunction

Specific Coding for Chronic lung allograft dysfunctionOverview

Non-specific codes like J4A require more characters. Use one of these billable codes instead:

  • Use J4A.0 for Restrictive allograft syndrome

  • Use J4A.8 for Other chronic lung allograft dysfunction

  • Use J4A.9 for Chronic lung allograft dysfunction, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to J4A: its own notes plus those printed at block J40-J4B and Chapter 10. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block J40-J4B Chronic lower respiratory diseases applies to 40 codes
  • bronchitis due to chemicals, gases, fumes and vapors (J68.0)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block J40-J4B Chronic lower respiratory diseases applies to 40 codes
From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • 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)

Code First

The underlying condition named in the note is sequenced before 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)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • code, where applicable, to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

  • if applicable, bronchiolitis obliterans syndrome (J44.81)

Notes

General instructions on how these codes are used.

From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g. tracheobronchitis to bronchitis in J40).

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name J4A, its category, or a range that includes it.

Code Also 1

These codes say J4A may also be needed to fully describe the condition. The note gives no sequencing direction.

  • J44.81 Bronchiolitis obliterans and bronchiolitis obliterans syndrome
    chronic lung allograft dysfunction (J4A.-)

Code HistoryHistory

FY 2024AddedAdded to the ICD-10-CM code setEffective October 1, 2023.
FY 2025–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About J4AOverview

What is the ICD-10 code for chronic lung allograft dysfunction?

J4A is the ICD-10-CM category for chronic lung allograft dysfunction, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is J4A (Chronic lung allograft dysfunction) a billable code?

No. This is a category header that groups the codes for chronic lung allograft dysfunction, and headers cannot be submitted on claims. Claims for chronic lung allograft dysfunction need a more specific code from this category, such as J4A.0, J4A.8, and J4A.9.

Can J4A be reported with J68.0?

Not as a rule. The Excludes1 note at block J40-J4B, which applies to J4A, lists "bronchitis due to chemicals, gases, fumes and vapors (J68.0)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is coded first with J4A?

The Code First note reads: , 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). When one of these applies, it is sequenced before J4A.