National Trends in Readmission Following Inpatient Surgery in the Hospital Readmissions Reduction Program Era

Objective: The aim of this study was to investigate whether the Hospital Readmissions Reduction Program, a national program that introduced financial penalties for high readmission rates for certain medical conditions, had a "spillover" effect on surgical conditions. Summary Background Data: During the past decade, there have been multiple national efforts to improve surgical care. Readmission rates are a key metric for assessing surgical quality. Whether surgical readmission rates have declined, and whether the Hospital Readmissions Reduction Program has had an influence is unclear. Methods: Using national Medicare data, we identified patients undergoing a range of procedures during the past decade. We examined whether certain procedures that would be targeted by the HRRP had a differential change in readmissions compared to other procedures. We used an interrupted timeseries model to examine readmission trends in three time periods: pre-ACA, HRRP implementation, and HRRP penalty. Results: Between 2005 and 2014, 17,423,106 patients underwent the procedures of interest; risk-adjusted rates of readmission across the 8 procedures declined from 12.2% to 8.6%. Pre-ACA rates of readmission were decreasing [ -0.060% per quarter (-0.072%, -0.048%), P < 0.001]. During the HRRP implementation period, the rate of decline of readmissions increased [ -0.129% (-0.142%, -0.116%), P < 0.001] and continued declining at a similar rate during the penalty period [ -0.118% (-0.131%, -0.105%), P < 0.001]. Largest declines in surgical readmissions were seen among the nontargeted procedures. The hospitals with the greatest reductions in medical readmissions also had the greatest drop in surgical readmissions. Conclusions: Surgical readmission rates have fallen during the past decade and rates of decline have increased during the HRRP period.