AJMC October 18, 2023
An increasing number of people with employer-sponsored insurance are covered by an insurer that offers Medicare Advantage in the state.
ABSTRACT
Objectives: Commercial health insurers can participate in the rapidly growing Medicare Advantage (MA) market, which may affect network formation and prices in traditional commercial insurance markets. We aim to quantify the prevalence and growth of commercial insurers participating in MA within the same state.
Study Design: Repeated cross-sectional analysis of Clarivate’s Interstudy enrollment data comprising the universe of insurers in the United States from 2015 to 2021.
Methods: We calculated the share of employer-sponsored insurance (ESI) enrollees covered by an insurer offering MA in their state in 2015, 2017, 2019, and 2021. We documented this share across states, years,...
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