FY2027 ICD-10-CM reference
J4A: Chronic lung allograft dysfunction
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Chronic lung allograft dysfunction. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- J4A.0: Restrictive allograft syndromeBillable code
- J4A.8: Other chronic lung allograft dysfunctionBillable code
- J4A.9: Chronic lung allograft dysfunction, unspecifiedBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
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: J00-J99 (chapter, inherited).
Instructional note
code, where applicable, to identify:
Source: J00-J99 (chapter, inherited).
Instructional note
exposure to environmental tobacco smoke (Z77.22)
Source: J00-J99 (chapter, inherited).
Instructional note
exposure to tobacco smoke in the perinatal period (P96.81)
Source: J00-J99 (chapter, inherited).
Instructional note
history of tobacco dependence (Z87.891)
Source: J00-J99 (chapter, inherited).
Instructional note
occupational exposure to environmental tobacco smoke (Z57.31)
Source: J00-J99 (chapter, inherited).
Instructional note
tobacco dependence (F17.-)
Source: J00-J99 (chapter, inherited).
Instructional note
tobacco use (Z72.0)
Source: J00-J99 (chapter, inherited).
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: J00-J99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: J00-J99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: J00-J99 (chapter, inherited).
Excludes2
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Source: J00-J99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: J00-J99 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: J00-J99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: J00-J99 (chapter, inherited).
Excludes2
smoke inhalation (T59.81-)
Source: J00-J99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: J00-J99 (chapter, inherited).
Excludes1
bronchitis due to chemicals, gases, fumes and vapors (J68.0)
Source: J40-J4B (section, inherited).
Excludes2
cystic fibrosis (E84.-)
Source: J40-J4B (section, inherited).
Code first
, if applicable:
Source: J4A (category, direct).
Code first
heart-lung transplant rejection (T86.31)
Source: J4A (category, direct).
Code first
lung transplant rejection (T86.810)
Source: J4A (category, direct).
Code first
other complications of heart-lung transplant (T86.39)
Source: J4A (category, direct).
Code first
other complications of lung transplant (T86.818)
Source: J4A (category, direct).
Code also
, if applicable, bronchiolitis obliterans syndrome (J44.81)
Source: J4A (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does J4A mean in FY2027?
The official ICD-10-CM descriptor is Chronic lung allograft dysfunction. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is J4A billable in FY2027?
The FY2027 order file marks J4A as a nonbillable heading. Select a complete billable child code.
Does J4A map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition