J4A.9 Chronic lung allograft dysfunction, unspecified

The ICD-10-CM code for Chronic lung allograft dysfunction, unspecified is J4A.9 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

10: Diseases of the respiratory system (J00-J99)

Section

J40-J4A: Chronic lower respiratory diseases (J40-J4A)

Category J4A

4 codes (3 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to J4A.9:

• Dysfunction › chronic › lung allograft

U.S. Hospital Utilization

• An estimated 155 U.S. inpatient stays in 2023 included J4A.9 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)