The all-cause 30-day hospital readmission rate among Medicare fee-for-service beneficiaries

...fell to 17.5% in 2013 from 18.5% in 2012; this rate had held constant from 2007 to 2011 at around 19% to 19.5%. Source: "New HHS Data Shows Major Strides Made in Patient Safety, Leading to Improved Care and Savings," U.S. Department of Health & Human Services, May 7, 2014, http://innovation.cms.gov/Files/reports/patient-safety-results.pdf