The Government Accountability Office (GAO) has issued a report entitled “CMS Faces Challenges with Methodology and Distribution of Physician Reports.” By way of background, CMS has established the Physician Feedback Program to give physicians confidential feedback on the resources used to provide care to Medicare beneficiaries, as mandated by the Medicare Improvements for Patients and Providers Act of 2008 (MIPPA). According to the GAO, CMS faces challenges incorporating resource use and quality measures for feedback reports that are meaningful, actionable, and reliable. CMS had difficulty measuring resources used to treat specific episodes of an illness (e.g., stroke or hip fracture), and the quality measures used in the program’s most recent phase applied to a limited number of physicians. CMS also must address certain methodological challenges, such as how to account for differences in beneficiary health status, how to attribute beneficiaries to physicians, how to set the minimum number of beneficiaries a physician must treat to receive a report, and how to select physicians' peer groups for comparison. CMS also faces a number of challenges distributing feedback reports to physicians. The GAO recommended that CMS use methodological approaches that increase physician eligibility for reports, statistically analyze the impact of its methodological decisions on report reliability, address factors that may prevent physicians from reading reports, and sample physicians on the usefulness and credibility of reports. CMS concurred with these recommendations.