The Effect of Extending the Window to Disenroll From Medicare Advantage Among Post-Acute Users.

Post-acute care users in Medicare Advantage (MA) plans may seek coverage changes if facing issues with plan benefits. In 2019, the Centers for Medicare and Medicaid Services extended the deadline to disenroll from an MA plan from February 14 to March 31 and, for the first time, permitted beneficiaries to switch to a different MA plan instead of traditional Medicare. Using 2016-2019 Medicare administrative data, we implemented a difference-in-differences approach to evaluate the impact of this policy on disenrollment from a plan within 1 month of initiating skilled nursing facility or home health services. When MA disenrollment rules became more flexible, overall rates of exiting MA plans did not change. Switching to a different MA plan increased after the policy change, but this outcome was so rare that this increase did not affect overall rates of exiting MA plans.