TABLE A1.
ICD-9-CM and ICD-10-CM codes used in our study
| Description | ICD-9-CM codes | ICD-10-CM codes |
|---|---|---|
| PE | 415.11, 415.12, 415.13, 415.19, 673.2, 673.20, 673.21, 673.22, 673.23, 673.24, 673.8, 673.80, 673.81, 673.82, 673.83, 673.84 | I26.01, I26.02, I26.09, I26.90, I26.92, I26.99, O88.211, O88.212, O88.213, O88.219, O88.22, O88.23, O88.811, O88.812, O88.813, O88.819, O88.82, O88.83 |
| DVT | 451.11, 451.19, 451.81, 451.83, 453.2, 453.4, 453.40, 453.41, 453.42, 453.8, 453.82, 453.83, 453.84, 453.85, 453.86, 453.87, 453.89, 453.9, 671.3, 671.30, 671.31, 671.32, 671.33, 671.34, 671.4, 671.40, 671.41, 671.42, 671.43, 671.44, 671.5, 671.50, 671.51, 671.52, 671.53, 671.54 | I80.10, I80.11, I80.12, I80.13, I80.201, I80.202, I80.203, I80.209, I80.211, I80.212, I80.213, I80.219, I80.221, I80.222, I80.223, I80.229, I80.231, I80.232, I80.233, I80.239, I80.291, I80.292, I80.293, I80.299, I80.8, I82.210, I82.220, I82.290, I82.401, I82.402, I82.403, I82.409, I82.411, I82.412, I82.413, I82.419, I82.421, I82.422, I82.423, I82.429, I82.431, I82.432, I82.433, I82.439, I82.441, I82.442, I82.443, I82.449, I82.491, I82.492, I82.493, I82.499, I82.4Y1, I82.4Y2, I82.4Y3, I82.4Y9, I82.4Z1, I82.4Z2, I82.4Z3, I82.4Z9, I82.601, I82.602, I82.603, I82.609, I82.621, I82.622, I82.623, I82.629, I82.890, I82.90, I82.91, I82.A11, I82.A12, I82.A13, I82.A19, I82.B11, I82.B12, I82.B13, I82.B19, I82C11, I82.C12, I82. C13, I82.C19, O22.30, O22.31, O22.32, O22.33, O22.50, O22.51, O22.52, O22.53, O22.91, O22.92, O22.93, O87.1, O87.3 |
| Chronic Corticosteroid Use | V58.65, V87.45 | Z92.241, Z79.52, Z79.5 |
| Personal History of VTE | V12.51, V12.55 | Z86.711, Z86.718 |
| Colorectal Surgery | Small bowel resection (45.61–45.63), colorectal resection (17.3, 45.71–45.79, 45.81–45.83, 48.40–48.49, 48.50–48.59, or 48.61–48.69), fistula repair (46.74, 46.76, 48.73, 48.93, 49.11, 49.12, 49.73, 57.83, 58.43, or 70.72–70.74) | Small bowel resection (45.61–45.63), colorectal resection (17.3, 45.71–45.79, 45.81–45.83, 48.40–48.49, 48.50–48.59, or 48.61–48.69), fistula repair (46.74, 46.76, 48.73, 48.93, 49.11, 49.12, 49.73, 57.83, 58.43, or 70.72–70.74) |
| Thrombophilia | 273.8, 286.9, 289.8, 289.81, 289.82 | D68.51, D68.52, D68.59, D68.61, D68.62, D68.69 |
| Clostridioides difficile | 008.45 | A04.7, A04.71, A04.72 |
| Colonoscopy or Flex Sig | 45.23, 45.24 | 0DJD8ZZ |
| Celiac Disease | 579.0 | K90.0 |
Abbreviations: DVT, Deep Venous Thrombosis; Flex Sig, Flexible Sigmoidoscopy; ICD-9-CM, International Classification of Diseases, 9th revision, Clinical Modification; ICD-10-CM, International Classification of Diseases, 10th revision, Clinical Modification; PE, Pulmonary Embolism; VTE, Venous Thromboembolism.