A quarter of Medicare Advantage subscribers changed providers in 2021, poll finds There's a desire for greater personalization, with 86% of members wanting their plan to personalize communication, care and services. , Associate Editor Medicare Advantage members are accustomed to change, at least according to new numbers provided by a new Icario survey. Conducted online by the Harris Poll among more than 1,200 Medicare subscribers, of whom 535 are Medicare Advantage subscribers, the poll revealed that 40% of Medicare Advantage subscribers made changes to their plans for 2021 and 25% say they stayed in a Medicare Advantage plan, but changed health plan providers. Icario is a health action company that uses technology, data science and behavioral insights to improve health outcomes.