2024 Medicare Advantage Enrollment Databook

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AUTHOR – ATI Advisory

ATI Advisory analyzed Medicare Advantage (MA) enrollment data from the Center for Medicare and Medicaid Services to identify and explore trends in MA enrollment. Between 2023 and 2024, Medicare Advantage gained more than two million new enrollees, reaching more than 50% of the Medicare eligible population. Medicare Fee-For-Service enrollment continued to decline nationwide with a reduction of more than 700K enrollees over the same time. While major carriers continued to dominate enrollment nationwide, several smaller MA plans also considerably expanded their enrollment. Special Needs Plans (SNPs) also saw dramatic growth, with almost 1,400 plans serving more than 6.6 million beneficiaries.

Recent Work


Access to LTSS-Like Supplemental Benefits Data Brief

Many individuals in the United States access long term services and supports (LTSS) through Medicaid. But for Medicare beneficiaries without Medicaid, LTSS-like supplemental benefits offered by Medicare Advantage (MA) plans can help increase access to LTSS. This ATI Advisory data brief examines whether access to and enrollment in MA plans offering LTSS-like supplemental benefits differs meaningfully by demographic characteristics, including age, gender, race and ethnicity, and geography.
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Opportunities to Improve Quality of Life and Health Outcomes Among People Experiencing Incontinence

ATI analyzes the prevalence of incontinence among dual eligible individuals, and highlights services and products that can help individuals manage their incontinence.
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Pathways to Serve “Medicare-Onlys” Outside of PACE

Many Medicare beneficiaries could benefit from a model like Program of All-Inclusive Care for the Elderly (PACE) that offers comprehensive Medicare and Medicaid benefits to frail, older adults who want to remain living in the community. However, many older adults on Medicare do not have Medicaid coverage, making PACE less affordable to them.
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See more Work
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