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.
ATI conducted a second analysis of 2023–2024 MA enrollment trends by Medicare beneficiary dual eligibility status (non-dual, full benefit dual eligible, partial benefit dual eligible), and found that, similar to the prior year, dual eligible individuals continued to comprise about one-quarter of MA enrollment in 2024, driven by Dual Eligible Special Needs Plans (D-SNPs). Additionally, Chronic Condition Special Needs Plans (C-SNPs) experienced considerable dual eligible growth in select states, but overall, C-SNP dual eligible enrollment proportionally declined.