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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
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BMC Medical Research Methodology

ISSN: 1471-2288

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