Definition of comorbidities
| Comorbidity | ICD-9-CM code(s) |
|---|---|
| Allergic bronchopulmonary aspergillosis | 518.6 |
| Asthma (includes extrinsic asthma, intrinsic asthma and asthma with COPD) | 493 |
| Bronchiectasis | 494 |
| Chronic bronchitis | 491 |
| Churg-Strauss disease (Wegener's granulomatosis) | 446.4 |
| COPD | 496 |
| Cystic fibrosis | 277.0 |
| Emphysema | 492 |
| Hypersensitivity pneumonitis | 495.9 |
| Interstitial lung diseases | 506.4, 508.1, 515, 516.3, 714.81, 770.7 |
| Pulmonary eosinophilia | 518.3 |
COPD, chronic obstructive pulmonary disease; ICD-9-CM, International Classification of Diseases, Ninth Revision, Clinical Modification.