What's Driving High Disenrollment in Medicare Advantage?

Disenrollment rates are one way that policy makers assess the performance of Medicare Advantage (MA) health plans. We use 3 years of data published by the Centers for Medicare & Medicaid Services (CMS) to examine the characteristics of MA contracts with high disenrollment rates from 2015 to 2017 and the relationship between disenrollment rates in MA contracts and 6 patient experiences of care performance measures. We find that MA contracts with high disenrollment rates were significantly more likely to be for-profit, small, and enroll a greater proportion of low-income and disabled individuals. After adjusting for plan characteristics, contracts with the highest levels of disenrollment were statistically significantly more likely to perform poorly on all 6 patient experience measures. CMS should consider additional oversight of MA contracts with high levels of disenrollment and consider publishing disenrollment rates at the plan level instead of at the contract level.