J4A.0 Restrictive allograft syndrome

The ICD-10-CM code for Restrictive allograft syndrome is J4A.0 (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.0:

• Syndrome › restrictive allograft
• Dysfunction › chronic › lung allograft › mixed

U.S. Hospital Utilization

J4A.0 appeared in too few sampled U.S. inpatient stays in 2023 to report a national estimate (AHRQ suppresses counts of 10 or fewer) — a rare inpatient diagnosis.

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)