UNDERSTANDING CLINICAL DRIVERS AND ECONOMIC IMPACT OF HIP AND KNEE ARTHROPLASTY BUNDLE BUSTERS

Introduction Bundle payment models have clinical and economic impacts on providers. Despite efforts made to improve care, experience has shown that a few episodes with costs well above a target (bundle busters) can reduce or negate positive performances. The purpose of this study was to identify both the primary episode drivers of cost and patient factors that led to episodes above target. Methods A retrospective study of 10,000 joint replacement episodes from a large healthcare system in CJR and a private orthopedic practice in BPCI was conducted. Episodes with costs greater than target price (TP) were designated as bundle busters and sub-divided into 4 groups: 1) 1 to 2 SD above TP (n=240) 3)> 2 to 3 SD above TP (n=70) 4)> 3 SD above TP (n=70) Bundle busters were compared to the control that were at/below the TP (n= 7500). For the CJR/BPCI cohorts, one SD was defined as $10,700/$13,000, respectively. Two linear regressions assessed the likelihood of facto...