Appendix 2.
Diagnosis Codes Used to Identify CHADS2 Stroke Risk and ATRIA Bleeding Risk Factors
| Risk factor | ICD-9 codes |
|---|---|
| Prior stroke/TIA | 433.xx, 434.xx, 435.0, 435.1, 435.2, 435.3, 435.8, 435.9 |
| Hypertension | 401.xx-405.x |
| Diabetes | 250.xx |
| Heart failure | 398.91, 402.01, 402.11, 425.1, 425.4, 425.7, 428.xx |
| Anemia | 285.1, 282.41, 282.42, 282.5, 282.60–282.64, 282.68, 282.69, 280.1, 280.8, 280.9, 281.0, 281.1, 281.2, 281.3, 281.4, 281.8, 281.9, 284.0, 284.01, 284.09, 284.1, 284.8, 284.81, 284.89, 284.9, 280, 283.0, 283.1, 283.11, 283.19, 283.2, 283.9, 282.0, 282.1, 282.2, 282.3, 282.4, 282.49, 282.7, 282.8, 282.9, 284.2, 285.0, 285.21, 285.22, 285.29, 285.8, 285.9 |
| Severe renal disease | 584, 584.5, 584.6, 584.7, 584.8, 584.9, 585, 585.3, 585.4, 585.5, 585.6, 585.9, 586, 792.5, V420, V451, V4511, V4512, V560, V561, V562, V5631, V5632, V568 |
| Bleeding | 423.0, 430.**, 431.**, 432.**, 852.0*, 852.2*, 852.4*, 853.0*, 455.2, 455.5, 455.8, 456.0, 456.20, 459.0, 530.7, 530.82, 531.00, 531.01, 531.20, 531.21, 531.40, 531.41, 531.60, 531.61, 533.01, 533.20, 533.21, 533.40, 533.41, 533.60, 533.61, 534.00, 534.01, 534.20, 534.21, 534.40, 534.41, 534.60, 534.61, 535.11, 535.21, 535.31, 535.41, 535.51, 535.61, 537.83, 562.02, 562.03, 562.12, 562.13, 568.81, 569.3, 569.85, 578, 578.0, 578.1, 578.9, 593.81, 599.7, 719.10, 719.11, 719.12, 719.13, 719.14, 719.15, 719.16, 719.17, 719.18, 719.19, 784.7, 784.8, 786.3 |
ATRIA indicates Anticoagulation and Risk Factors in Atrial Fibrillation; ICD-9, International Classification of Diseases, Ninth Revision; TIA, transient ischemic attack.