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Table 1 Summary of ICD 9 codes included in each category

From: Which ICD-9-CM codes should be used for bronchiolitis research?

Category Codes
Bronchiolitis 466, 466.1, 466.11, 466.19
Bronchitis 490, 466.0
Asthma codes (includes reactive airways disease) 493, 493.0, 493.00, 493.01, 493.02, 493.1, 493.10, 493.12, 493.9, 493.90, 493.91, 493.92
Bronchospasm or wheezing 519.11, 786.07
  1. Summary of ICD 9 codes included in each category. The shaded categories were combined to create the narrow diagnosis category and the unshaded combined to create the broad diagnosis category