• Qian Gu, Lane Koenig, Jennifer Faerberg, Caroline Rossi Steinberg, Christopher Vaz, and Mary P Wheatley.
• Econometrica Inc., Bethesda, MD.
• Health Serv Res. 2014 Jun 1;49(3):818-37.

ObjectiveTo explore the impact of the Hospital Readmissions Reduction Program (HRRP) on hospitals serving vulnerable populations.Data Sources/Study SettingMedicare inpatient claims to calculate condition-specific readmission rates. Medicare cost reports and other sources to determine a hospital's share of duals, profit margin, and characteristics.Study DesignRegression analyses and projections were used to estimate risk-adjusted readmission rates and financial penalties under the HRRP. Findings were compared across groups of hospitals, determined based on their share of duals, to assess differential impacts of the HRRP.Principal FindingsBoth patient dual-eligible status and a hospital's dual-eligible share of Medicare discharges have a positive impact on risk-adjusted hospital readmission rates. Under current Centers for Medicare and Medicaid Service methodology, which does not adjust for socioeconomic status, high-dual hospitals are more likely to have excess readmissions than low-dual hospitals. As a result, HRRP penalties will disproportionately fall on high-dual hospitals, which are more likely to have negative all-payer margins, raising concerns of unintended consequences of the program for vulnerable populations.ConclusionsPolicies to reduce hospital readmissions must balance the need to ensure continued access to quality care for vulnerable populations.© Health Research and Educational Trust.

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