Researchers in this study looked at how participating hospitals performed in Medicare’s Bundled Payments for Care Improvement initiative for five medical conditions (congestive heart failure, pneumonia, chronic obstructive pulmonary disease, sepsis, and acute myocardial infarction) and compared them with matched control hospitals. Hospitals in the initiative did not have lower costs or other better outcomes compared with those not participating. Bundling for medical conditions may require more time, new care strategies and partnerships, or additional incentives.