Comorbidity	ICD-9-CM Definition
Congestive heart failure	428.xx, 398.91, 402.01, 402.11, 402.91, 404.01, 404.11, 404.03, 404.13, 404.91, 404.93
Hypertension	401.xx, 402.xx, 403.xx, 404.xx, 405.xx, 437.2
Diabetes	250.xx, 357.2, 362.0x, 366.41
Liver disease	571.5, 572.0, 572.1, 572.2, 572.3, 572.4, 572.8, 789.5, 789.59, 570, 571.6, 571.8, 571.9, 573.0, 573.4, 573.8, 573.9, 782.4, 789.1, 790.4, 790.5, 794.8, V42.7
Renal disease	584.5, 584.6, 584.7, 584.8, 584.9, 586, 585, 585.3, 585.4, 585.5, 585.6, 585.9, 792.5, V42.0, V45.1, V54.11, V45.12, V56.0, V56.1, V56.2, V56.31, V56.32, V56.8
Previous ischemic stroke or TIA	433.x1, 434.x1, 435.x, 436, 438.x
Coronary artery disease	410.xx-414.xx
Deep vein thromboembolism or pulmonary embolism	451.11, 451.19, 451.2, 451.81, 451.9, 453.40, 453.41, 453.42, 453.5x, 453.8, 453.9, 415.1, 415.11, 415.13, 415.19
Hemorrhagic stroke	430.xx, 431.xx, 432.x, 852.0x, 852.2x, 852.4x, 853.0x
Gastrointestinal bleeding	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, 533.00, 533.01, 533.20, 533.21, 533.40, 533.41, 533.61, 534.00, 534.01, 534.20, 534.21, 534.40, 534.41, 534.61, 535.01, 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
Other major bleeding	423.0, 459.0, 593.81, 719.1, 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, 599.7, 285.1, 280.9, 280.0, 285.9
Bleeding history or predisposition	430.xx, 431.xx, 432.x, 852.0x, 852.2x, 852.4x, 853.0x, 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, 533.00, 533.01, 533.20, 533.21, 533.40, 533.41, 533.61, 534.00, 534.01, 534.20, 534.21, 534.40, 534.41, 534.61, 535.01, 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, 423.0, 459.0, 593.81, 719.1, 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, 599.7, 285.1, 280.9, 280.0, 285.9
Malignancy	140, 141, 142, 143, 144, 145,146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
Depression	296.2, 296.3, 298.0, 300.4, 301.12, 311
Dementia	290, 294, 330, 331

ICD-9-CM = International Classification of Diseases, Ninth Revision, Clinical Modification; TIA = transient ischemic attack.