DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

J4A Chronic lung allograft dysfunction

  • Header · not billable

J4A is not billable. The category heads 3 billable codes in FY2027: the 3 codes directly below it.

Index → code

  • Syndromerestrictive allograft → J4A.0
  • Dysfunctionchroniclung allograft → J4A.9
  • Dysfunctionchroniclung allograftmixed → J4A.0

Where it sits

  1. Chapter 10 Diseases of the respiratory system (J00-J99)
  2. J40-J4B Chronic lower respiratory diseases (J40-J4B)
  3. J4A Chronic lung allograft dysfunction
Billable codes
3
Subdivisions
3
CC / MCC codes
0 / 0
HCC V28 codes
3
New FY2027
0
Index entries
4

Codes in J4A

  1. J4A.0
    Restrictive allograft syndrome
    Billable276
    Code also 1

    Code also

    • , if applicable, for mixed chronic lung allograft dysfunction, bronchiolitis obliterans syndrome (J44.81) J44.81
  2. J4A.8
    Other chronic lung allograft dysfunction
    Billable276
  3. J4A.9
    Chronic lung allograft dysfunction, unspecified
    Billable276

Sources of each column.

Instructions

At J4A

Code first

  • , if applicable:
  • heart-lung transplant rejection (T86.31) T86.31
  • lung transplant rejection (T86.810) T86.810
  • other complications of heart-lung transplant (T86.39) T86.39
  • other complications of lung transplant (T86.818) T86.818

Code also

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

Notes that also apply

Block J40-J4B instructions (Excludes1 1, Excludes2 1): printed on the block page.

Chapter 10 instructions (Notes 1, Excludes2 9, Use additional code 7): printed on the chapter 10 page.

Index entries

  • Syndromerestrictive allograft → J4A.0
  • Dysfunctionchroniclung allograft → J4A.9
  • Dysfunctionchroniclung allograftmixed → J4A.0
  • Dysfunctionchroniclung allograftspecified NEC → J4A.8

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy