Table E1.
International Classification of Disease (ICD) codes used for asthma inclusion criteria
| Code | Description |
|---|---|
| ICD-10 codes | |
| J45 | Asthma |
| J45.2 | Mild intermittent asthma |
| J45.20 | Mild intermittent asthma uncomplicated |
| J45.21 | Mild intermittent asthma with (acute) exacerbation |
| J45.22 | Mild intermittent asthma with status asthmaticus |
| J45.3 | Mild persistent asthma |
| J45.30 | Mild persistent asthma uncomplicated |
| J45.31 | Mild persistent asthma with (acute) exacerbation |
| J45.32 | Mild persistent asthma with status asthmaticus |
| J45.4 | Moderate persistent asthma |
| J45.40 | Moderate persistent asthma uncomplicated |
| J45.41 | Moderate persistent asthma with (acute) exacerbation |
| J45.42 | Moderate persistent asthma with status asthmaticus |
| J45.5 | Severe persistent asthma |
| J45.50 | Severe persistent asthma uncomplicated |
| J45.51 | Severe persistent asthma with (acute) exacerbation |
| J45.52 | Severe persistent asthma with status asthmaticus |
| J45.9 | Other and unspecified asthma |
| J45.90 | Unspecified asthma |
| J45.901 | Unspecified asthma with (acute) exacerbation |
| J45.902 | Unspecified asthma with status asthmaticus |
| J45.909 | Unspecified asthma uncomplicated |
| J45.99 | Other asthma |
| J45.990 | Exercise-induced bronchospasm |
| J45.991 | Cough variant asthma |
| J45.998 | Other asthma |
| ICD-9 codes | |
| 493 | Asthma |
| 493.0 | Extrinsic asthma |
| 493.00 | Extrinsic asthma, unspecified |
| 493.01 | Extrinsic asthma with status asthmaticus |
| 493.02 | Extrinsic asthma with (acute) exacerbation |
| 493.1 | Intrinsic asthma |
| 493.10 | Intrinsic asthma, unspecified |
| 493.11 | Intrinsic asthma with status asthmaticus |
| 493.12 | Intrinsic asthma with (acute) exacerbation |
| 493.2 | Chronic obstructive asthma |
| 493.20 | Chronic obstructive asthma, unspecified |
| 493.21 | Chronic obstructive asthma with status asthmaticus |
| 493.22 | Chronic obstructive asthma with (acute) exacerbation |
| 493.8 | Other forms of asthma |
| 493.81 | Exercise-induced bronchospasm |
| 493.82 | Cough variant asthma |
| 493.9 | Asthma unspecified |
| 493.90 | Asthma, unspecified type, unspecified |
| 493.91 | Asthma, unspecified type, with status asthmaticus |
| 493.92 | Asthma, unspecified type, with (acute) exacerbation |