U.S. ICD-10-CM · FY 2027

J4A ICD-10-CM Code: Chronic lung allograft dysfunction

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

J4A

Chronic lung allograft dysfunction

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where J4A sits

  1. 1

    Chapter 10

    Diseases of the respiratory system (J00-J99)

  2. 2

    Section

    Chronic lower respiratory diseases (J40-J4B)

  3. 3

    Category J4A

    Chronic lung allograft dysfunction

  4. 4

    Code J4A

    Chronic lung allograft dysfunction

More specific choices

Codes under J4A

J4A is a non-billable category. Choose the child code that best matches the documented diagnosis.

J4A.0

Restrictive allograft syndrome

J4A.8

Other chronic lung allograft dysfunction

J4A.9

Chronic lung allograft dysfunction, unspecified

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for J4A.

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)

Use additional code

No “use additional code” instruction is listed for J4A.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for J4A.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for J4A.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code J4A mean?

J4A is the FY 2027 U.S. ICD-10-CM code for “Chronic lung allograft dysfunction.”

Is J4A a billable or specific ICD-10-CM code?

No. J4A has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is J4A located in ICD-10-CM?

J4A is listed in Chapter 10, Diseases of the respiratory system (J00-J99), within Chronic lower respiratory diseases (J40-J4B) (J40–J4B), under category J4A, Chronic lung allograft dysfunction.

What coding notes are listed for J4A?

No inclusion terms are listed for J4A in this reference record. Code-first instructions: , 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). No Excludes1 note is listed. No Excludes2 note is listed.

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