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ICD10BillableValid for clinical use

ICD-10 Code J4A.0: Restrictive allograft syndrome

J4A.0 is a billable ICD-10 diagnosis code used to classify Restrictive allograft syndrome in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the respiratory system (J00-J99).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the respiratory system (J00-J99).

When is it used?

  • May be used when a clinician documents restrictive allograft syndrome in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
10Diseases of the respiratory system (J00-J99)
block
J40-J4AChronic lower respiratory diseases
category
J4AChronic lung allograft dysfunction
currentJ4A

Official coding notes

Code also
  • , if applicable, for mixed chronic lung allograft dysfunction, bronchiolitis obliterans syndrome (J44.81)

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

PulmonologistGeneral Physician

Coding guidelines

Common synonyms

Restrictive allograft syndrome

Frequently asked questions

Code details

CodeJ4A.0
SystemICD10
Display nameRestrictive allograft syndrome
ChapterDiseases of the respiratory system (J00-J99)
BlockChronic lower respiratory diseases

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
DysfunctionSyndrome

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.