ICD-10 Diagnosis Code J21.9

Acute bronchiolitis, unspecified

Diagnosis Code J21.9

ICD-10: J21.9
Short Description: Acute bronchiolitis, unspecified
Long Description: Acute bronchiolitis, unspecified
This is the 2017 version of the ICD-10-CM diagnosis code J21.9

Code Classification
  • Diseases of the respiratory system
    • Other acute lower respiratory infections (J20-J22)
      • Acute bronchiolitis (J21)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code J21.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Acute bronchiolitis
  • Acute bronchiolitis with bronchospasm
  • Acute bronchiolitis with obstruction
  • Acute bronchospasm
  • Acute exudative bronchiolitis
  • Acute obliterating bronchiolitis
  • Acute viral bronchiolitis
  • Bronchiolitis
  • Bronchiolitis exudativa
  • Bronchospasm
  • Diffuse panbronchiolitis
  • Necrosis of bronchus
  • Necrotizing bronchiolitis

Index of Diseases and Injuries
References found for the code J21.9 in the Index of Diseases and Injuries:

Information for Patients

Bronchial Disorders

The bronchi are two tubes that branch off the trachea, or windpipe. The bronchi carry air to your lungs.

The most common problem with the bronchi is bronchitis, an inflammation of the tubes. Bronchitis can be acute or chronic. Other problems include

  • Bronchiectasis, a condition in which damage to the airways causes them to widen and become flabby and scarred
  • Exercise-induced bronchospasm, which happens when the airways shrink while you are exercising
  • Bronchiolitis, an inflammation of the small airways that branch off from the bronchi
  • Bronchopulmonary dysplasia, a condition affecting infants

Treatment of bronchial disorders depends on the cause.

  • Bronchiectasis
  • Bronchiolitis
  • Bronchiolitis - discharge
  • Bronchopulmonary dysplasia
  • Postural drainage
  • Tracheal rupture

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