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International Classification of Diseases ninth and 10th revision (ICD-9/ICD-10) codes included in the case definition for chronic obstructive pulmonary disease
| ICD-9 description | Code |
|---|---|
| Chronic bronchitis | 491 |
| Emphysema | 492 |
| Chronic airways obstruction, not elsewhere classified | 496 |
| ICD-10 description | Code |
| Simple and mucopurulent chronic bronchitis | J41 |
| Unspecified chronic bronchitis | J42 |
| Emphysema | J43 |
| Other chronic obstructive pulmonary disease | J44 |
