TABLE I.

Inclusion and Exclusion Criteria for Inpatient Elective Orthopaedic Surgery

	Code
Inclusion criteria: procedures
Total hip arthroplasty	MS-DRG: 469, 470; PRCCS: 153
Total knee arthroplasty	MS-DRG: 469, 470; PRCCS: 152
Cervical fusion	MS-DRG: 471, 472, 473; PRCCS: 158
Thoracolumbar fusion	MS-DRG: 453, 454, 455, 459, 460; PRCCS: 158
Exclusion criteria: diagnoses
Revision joint replacement	MS-DRG: 466, 467, 468
Fracture	MS-DRG: 533, 534, 535, 536, 562, 563
Pathologic fracture	MS-DRG: 542, 543, 544
Infection	MS-DRG: 853, 854, 855, 856, 857, 858, 862, 863
Septic arthritis	MS-DRG: 548, 549, 550
Osteomyelitis	MS-DRG: 539, 540, 541
Spinal infection	MS-DRG: 094, 095, 096; ICD-10: M50.90, M46.44, M46.46, M46.20, T81.4
Spinal tumor	MS-DRG: 456, 457, 458; ICD-10: M48.5, G95.2, D16.6, C41.2, C79.5