Aetna, Insurtechs Outpaced Medicare Advantage Peers in Quieter OEP

Medicare Advantage enrollment grew by 350,000 members during the 2024 Open Enrollment Period (OEP), according to CMS’s May data release and AIS’s Directory of Health Plans. That’s a 31% drop from last year, which saw 507,000 sign-ups from February to May, and it reflects a slowdown in MA growth also seen in the Annual Election Period (AEP).

© 2025 MMIT
Carina Belles

Carina Belles

Carina has been covering public-sector health care since 2018. As a data reporter for Radar on Medicare Advantage, she creates infographics and data stories on issues impacting Medicare, Medicaid and Part D. She also develops AIS Health Daily, a free daily newsletter that showcases AIS’s strong reporting across our four publications and parent company Norstella’s suite of market access and data solutions. Prior to joining the editorial team, she managed Medicare and Medicaid data for the Directory of Health Plans, AIS’s industry-standard health coverage database. She graduated from Ohio University with a B.S. in Journalism.

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