Substantial Growth In Medicare Advantage And Implications For Reform

Area of Science:

• Health Services Research
• Public Health
• Health Policy Analysis

Background:

• Medicare Advantage (MA) is a managed care option replacing traditional Medicare.
• Understanding enrollment trends is crucial for healthcare policy and resource allocation.

Purpose of the Study:

• To analyze Medicare Advantage enrollment trends from 2006 to 2022.
• To assess the penetration of MA plans nationally and at the county level.

Main Methods:

• Analysis of Medicare beneficiary enrollment data from 2006 through 2022.
• Calculation of MA enrollment growth and traditional Medicare enrollment changes.
• Determination of national and county-level MA penetration rates.

Main Results:

• Medicare Advantage enrollment increased by 22.2 million beneficiaries (337.0%) between 2006 and 2022.
• Traditional Medicare enrollment decreased by 1.0 million beneficiaries (-2.9%) during the same period.
• In 2022, national MA penetration reached 49.9%, with 24.0% of beneficiaries in counties having ≥60% MA penetration.

Conclusions:

• Medicare Advantage has experienced substantial growth, becoming a dominant enrollment pathway.
• A significant portion of Medicare beneficiaries are now in areas with high MA plan availability.
• These trends indicate a major shift in Medicare beneficiary choices and market dynamics.