Table 4.
ICD-9-CM codes corresponding with IBD-related medical encounters and all HC-associated encounters.
| ICD-9-CM description | ICD-9-CM code | Number (%) of subjects with co-Diagnoses |
Total number, median (IQR) of separate medical encounters |
||||
|---|---|---|---|---|---|---|---|
| CD | UC | HC | CD | UC | HC | ||
| Infectious and parasitic diseases | 001–139 | 120 (12.0) | 145 (14.5) | 61 (12.2) | 2451 (1,2) | 3401 (1, 3) | 881 (1, 2) |
| Neoplasms | 140–239 | 77 (7.7) | 158 (15.8) | 26 (5.2) | 1231 (1, 2) | 2961 (1, 2) | 811 (1, 2) |
| Endocrine, nutritional and metabolic diseases and immunity disorders | 240–279 | 202 (20.2) | 263 (26.3) | 55 (11.0) | 4822 (1, 3) | 8442 (1, 4) | 991 (1, 2) |
| Diseases of the blood and blood forming organs | 280–289 | 155 (15.5) | 206 (20.6) | 29 (5.8) | 4822 (1, 4) | 7452 (1, 4) | 1202 (1, 4) |
| Mental disorders | 290–319 | 207 (20.7) | 199 (19.9) | 142 (28.4) | 6192 (1, 4) | 6542 (1, 3) | 8133 (1, 6) |
| Diseases of the nervous system | 320–359 | 99 (9.9) | 119 (11.9) | 19 (3.8) | 2231 (1, 2) | 2871 (1, 3) | 221 (1, 1) |
| Diseases of the sense organs | 360–389 | 47 (4.7) | 88 (8.8) | 11 (2.2) | 691 (1, 2) | 1441 (1, 1) | 141 (1, 2) |
| Diseases of the circulatory system | 390–459 | 176 (17.6) | 252 (25.2) | 40 (8.0) | 3671 (1, 2) | 7482 (1, 3) | 651 (1, 2) |
| Diseases of the respiratory system | 460–519 | 117 (11.7) | 154 (15.4) | 55 (11.0) | 2191 (1, 2) | 3001 (1, 2) | 1181 (1, 2) |
| Diseases of the digestive system | 520–579 | 589 (58.9)a | 630 (63.0)b | 88 (17.6) | 2714a3 (1,6) | 2555b2 (1, 5) | 1981 (1, 2) |
| Diseases of the genitourinary system | 580–629 | 97 (9.7) | 96 (9.6) | 39 (7.8) | 2071 (1, 2) | 1721 (1, 2) | 691 (1, 2) |
| Complications of pregnancy, childbirth and the puerperium | 630–679 | 17 (1.7) | 23 (2.3) | 10 (2.0) | 1256 (4, 10) | 1633 (2, 6) | 303 (2, 4) |
| Diseases of the skin and subcutaneous tissue | 680–709 | 136 (13.6) | 155 (15.5) | 19 (3.8) | 2331 (1, 2) | 2981 (1, 2) | 281 (1, 2) |
| Diseases of the musculoskeletal system and connective tissue | 710–739 | 257 (25.7) | 305 (30.5) | 73 (14.6) | 7002 (1, 3) | 9932 (1, 4) | 1881 (1, 3) |
| Congenital anomalies | 740–759 | 30 (3.0) | 13 (1.3) | 5 (1.0) | 451 (1, 2) | 181 (1, 2) | 81 (1, 2) |
| Certain conditions originating in the perinatal period | 760–779 | 2 (0.2) | 1 (0.1) | 0 (0.0) | 21 (1, 1) | 8 (-, -) | 0 (-, -) |
| Symptoms, signs and ill-defined conditions | 780–799 | 539 (53.9) | 554 (55.4) | 221 (44.2) | 22152 (1, 5) | 22982 (1, 5) | 8392 (1, 4) |
| Injury and poisoning | 800–999 | 119 (11.9) | 110 (11.0) | 51 (10.2) | 2521 (1, 2) | 2191 (1, 2) | 1081 (1, 2) |
a
Does not include CD diagnoses.
b
Does not include UC diagnoses.