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Medicare Update Enrollment in 2023

More than half of eligible Medicare beneficiaries are enrolled in Medicare Advantage in 2023

In 2023, more than half (51%) of eligible Medicare beneficiaries – 30.8 million people out of 60.0 million Medicare beneficiaries with both Medicare Parts A and B – are enrolled in Medicare Advantage plans. Medicare Advantage enrollment as a share of the eligible Medicare population has jumped from 19% in 2007 to 51% in 2023 (Figure 1).

Figure 1 (Medicare Advantage Penetration)

Total Medicare Advantage Enrollment, 2007-2023

Figure 1 (Medicare Advantage Enrollment)

NOTE: Enrollment data are from March of each year. Includes Medicare Advantage plans: HMOs, PPOs (local and regional), PFFS, and MSAs. About 60.0 million people are enrolled in Medicare Parts A and B in 2023.
SOURCE: KFF analysis of CMS Medicare Advantage Enrollment Files, 2010-2023; Medicare Chronic Conditions (CCW) Data Warehouse from 5 percent of beneficiaries, 2010-2016; CCW data from 20 percent of beneficiaries, 2017-2020; and Medicare Enrollment Dashboard 2021-2023.

Figure 2

Medicare Advantage and Traditional Medicare Enrollment, Past and Projected

Figure 3

Distribution of Medicare Advantage Enrollees by Plan Type, 2023

Figure 4

Number of Beneficiaries in Employer Group or Union-Sponsored Health Plans, 2010-2023

In millions

NOTE: Employer group or union-sponsored health plans do not reflect arrangements where the employer provides a subsidy for retirees to use toward premiums or cost sharing for a plan purchased on an individual Medicare Advantage marketplace.SOURCE: KFF analysis of CMS Medicare Advantage Enrollment Files, 2010-2023

Figure 5

Number of Beneficiaries in Special Needs Plans, 2010-2023

In millions

NOTE: Numbers may not sum to the total due to rounding.SOURCE: KFF analysis of CMS Medicare Advantage Enrollment Files, 2010-2023.

Figure 6

Share of Beneficiaries Enrolled in Medicare Advantage in 2023, by State

Figure 7

Medicare Advantage Penetration, by County, 2023

Figure 8

Medicare Advantage Enrollment by Firm or Affiliate, 2023

Figure 9

Medicare Advantage Enrollment by Firm or Affiliate, 2010-2023

NOTE: All other insurers includes firms with less than 2% of total enrollment. BCBS are BlueCross and BlueShield affiliates and includes Anthem BCBS plans (Elevance). Non-BCBS Elevance plans are 2% of total enrollment. Percentages may not sum to 100% due to rounding.SOURCE: KFF analysis of CMS Medicare Advantage Enrollment Files, 2010-2023.

Figure 10

Medicare Advantage Enrollment by Firm or Affiliate, 2010-2023

NOTE: All other insurers includes firms with less than 2% of total enrollment. BCBS are BlueCross and BlueShield affiliates and includes Anthem BCBS plans (Elevance). Non-BCBS Elevance plans are 2% of total enrollment.SOURCE: KFF analysis of CMS Medicare Advantage Enrollment Files, 2010-2023

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Medicare Update Enrollment in 2023

More than half of eligible Medicare beneficiaries are enrolled in Medicare Advantage in 2023

Figure 1 (Medicare Advantage Penetration)

Total Medicare Advantage Enrollment, 2007-2023

Figure 1 (Medicare Advantage Enrollment)

Figure 2

Medicare Advantage and Traditional Medicare Enrollment, Past and Projected

Figure 3

Distribution of Medicare Advantage Enrollees by Plan Type, 2023

Figure 4

Number of Beneficiaries in Employer Group or Union-Sponsored Health Plans, 2010-2023

In millions

Figure 5

Number of Beneficiaries in Special Needs Plans, 2010-2023

In millions

Figure 6

Share of Beneficiaries Enrolled in Medicare Advantage in 2023, by State

Figure 7

Medicare Advantage Penetration, by County, 2023

Figure 8

Medicare Advantage Enrollment by Firm or Affiliate, 2023

Figure 9

Medicare Advantage Enrollment by Firm or Affiliate, 2010-2023

Figure 10

Medicare Advantage Enrollment by Firm or Affiliate, 2010-2023

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