The Government Accountability Office (GAO) has issued a report entitled “Medicare Special Needs Plans: CMS Should Improve Information Available about Dual-Eligible Plans' Performance.” The report examines the characteristics of dual-eligible beneficiaries enrolled in Medicare Advantage plans known as dual-eligible special needs plans (D-SNPs), which serve Medicare beneficiaries who also are eligible for Medicaid because they meet income and other criteria. About 9% of the dual-eligible population is enrolled in 322 Medicare D-SNPs, and they were more frequently under age 65 and disabled, more likely to be eligible for full Medicaid benefits, and more frequently diagnosed with a chronic or disabling mental health condition than beneficiaries in other MA plans. The GAO found that D-SNPs provide fewer supplemental benefits on average than other MA plans, yet spend proportionately more of their rebate to fund supplemental benefits and less to reduce Medicare cost-sharing. The GAO recommends a number of steps CMS should take to increase D-SNPs' accountability, including: requiring D-SNPs to state explicitly in their models of care the extent of services they expect to provide; requiring D-SNPs to collect and report to CMS standard performance and outcome measures; and analyzing and publicizing the performance and outcomes data.