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Medicare Advantage Enrollment and Total Medicare Program Spending

March 2026
Full study

Greater Medicare Advantage (MA) enrollment was associated with lower standardized Medicare spending per capita for the years 2012-2021. Increased MA enrollment over the period could have generated as much as $111 billion in savings to the Medicare program.

MA enrollment has increased steadily over the past two decades, while Medicare spending per capita has been unexpectedly low relative to government agencies’ projections. Prior research has suggested several reasons for the lower than projected spending, but the relationship between MA enrollment and Medicare program spending had not been explored.

This study, published in INQUIRY: The Journal of Health Care Organization, Provision, and Financing, found that 10 percentage point higher MA penetration was associated with 1.5% lower total Medicare spending per capita. The study’s findings suggest that the recent growth of MA has played a key role in moderating overall Medicare program spending.

Topics

  • Medicare Program Spending 
  • Growth in MA Enrollment
  • Methods
  • Results
  • Discussion and Conclusion

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