Source: AARP Public Policy Institute analysis using data from the U.S. Department of Health and Human Services, Centers for Medicare and Medicaid Services (CMS), Medicare Enrollment Dashboard Data File.

Notes: The enrollment counts are determined using a person-year methodology.  These counts represent Medicare beneficiaries enrolled in both Hospital Insurance and Supplementary Medical Insurance.  Numbers may not add to totals because of rounding.

Original Medicare is Medicare’s traditional health care system (also known as fee-for-service).  Medicare Advantage and Other Health Plans (MA and Other) are health plans that are offered by private companies approved by Medicare to provide hospital and medical coverage.

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