ICD-9-CM Diagnosis Codes for Respiratory Conditions or Respiratory Failure

Respiratory Condition	ICD-9-CM Code
Acute respiratory infection	466.xx
Pneumonia	480.x–487.0
Chronic bronchitis	490–491.xx
Emphysema	492.x
Bronchiectasis	494.x
Pneumonitis and pneumoconiosis	495.x, 500–508.x
Chronic obstructive pulmonary disease	496
Empyema, pleurisy, and pneumothorax	510.x–512.x
Respiratory failure	518.81–518.84
Abscess of lung and mediastinum	513.x
Pulmonary congestion and hypostasis	514
Post-inflammatory pulmonary fibrosis	515
Other alveolar and parietoalveolar pneumonopathy	516.x
Pulmonary collapse	518.0
Pulmonary eosinophilia	518.3
Acute edema of lung, unspecified	518.4
Pulmonary insufficiency following trauma or surgery	518.5
Allergic bronchopulmonary aspergillosis	518.6
Transfusion-related acute lung injury	518.7
Other diseases of the lung, not elsewhere classified	518.89
Other diseases of the respiratory system	519.xx

Note: Asthma would have been added as a respiratory condition; however, patients with medical claims with diagnosis codes for asthma were excluded from the study population.