Table 1.
List of Procedure Groups and ICD9-CM Principal Procedure Codes, and Number of Matched Pairs from Each Procedure Group
| Procedure Group | Inside the Same Hospital Match N = 14,917 Matched Pairs |
Across-Hospital Matches N = 18,861 Matched Pairs |
ICD-9-CM Principal Procedure Codes | ||
|---|---|---|---|---|---|
| N | % | N | % | ||
| Large Bowel Resections | 4,012 | 26.9 | 4,746 | 25.2 | 1731, 1732, 1733, 1734, 1735, 1736, 1739, 4571, 4572, 4573, 4574, 4575, 4576, 4579, 458, 4581, 4582, 4583 |
| Gallbladder Procedures | 3,753 | 25.2 | 4,068 | 21.6 | 5122, 5123, 5124, 5132, 5136, 5137, 5141, 5151 |
| Breast Procedures | 1,313 | 8.8 | 1,667 | 8.8 | 8522, 8523, 8541, 8542, 8543, 8544, 8545, 8546, 8547, 8548 |
| Lysis of Adhesions | 1,056 | 7.1 | 1,252 | 6.6 | 5451, 5459 |
| Small Bowel Resections | 698 | 4.7 | 845 | 4.5 | 4561, 4562, 4563 |
| Thyroid Procedures | 547 | 3.7 | 777 | 4.1 | 062, 0631, 0639, 064, 0650, 0651, 0652 |
| Incisional and Abdominal Hernias | 493 | 3.3 | 593 | 3.1 | 5361, 5369, 5372, 5375, 537 |
| Inguinal Hernia Procedures | 486 | 3.3 | 759 | 4.0 | 1711, 1712, 1713, 1721, 1722, 1723, 1724, 5300, 5301, 5302, 5303, 5304, 5305, 5310, 5311, 5312, 5313, 5314, 5315, 5316, 5317 |
| Stomach Procedures | 453 | 3.0 | 796 | 4.2 | 4342, 435, 436, 437, 4389, 4399, 4429, 4438, 4439, 4466, 4467, 4469, 4495 |
| Rectal Procedures | 414 | 2.8 | 561 | 3.0 | 4849, 485, 4850, 4851, 4852, 4859, 4862, 4863, 4869, 4875, 4876, 4879 |
| Appendectomies | 366 | 2.5 | 448 | 2.4 | 4701, 4709 |
| Parathyroidectomy | 336 | 2.3 | 453 | 2.4 | 0681, 0689 |
| Ostomy Procedures | 198 | 1.3 | 411 | 2.2 | 4601, 4603, 4610, 4611, 4613, 4620, 4621, 4622, 4623, 4639, 4642, 4651, 4652 |
| Pancreatic Procedures | 152 | 1.0 | 205 | 1.1 | 5252, 5259, 526, 527 |
| Ventral Hernia Repairs | 125 | 0.8 | 227 | 1.2 | 5351, 5359 |
| Umbilical Hernia Procedures | 100 | 0.7 | 194 | 1.0 | 5341, 5349 |
| Bowel Procedures, Other | 77 | 0.5 | 188 | 1.0 | 4673, 4674, 4675, 4679 |
| Ulcer Surgeries | 75 | 0.5 | 148 | 0.8 | 4441, 4442 |
| Splenectomy | 53 | 0.4 | 88 | 0.5 | 415 |
| Liver Procedures | 49 | 0.3 | 62 | 0.3 | 5022, 5029, 503, 5059 |
| Adrenal Procedures | 45 | 0.3 | 73 | 0.4 | 0722, 0729, 073 |
| PD Access Procedure | 41 | 0.3 | 91 | 0.5 | 5493 |
| Bowel Anastomoses | 27 | 0.2 | 91 | 0.5 | 4590, 4591, 4592, 4593, 4594, 4595 |
| Femoral Hernia Procedures | 24 | 0.2 | 56 | 0.3 | 5321, 5329 |
| Esophageal Procedures | –* | 0.1 | 40 | 0.2 | 4240, 4241, 4242, 427 |
| Repair of Vaginal Fistulas | < 11 | 0.0 | 22 | 0.1 | 7072, 7073, 7074, 7075 |
| Total: | 14,917 | 100 | 18,861 | 100 | |
*
True number of pairs is masked to comply with CMS cell size suppression rules.