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Medicare Advantage in 2025: Enrollment Update and Key Trends

In 2025, more than half (54%) of eligible Medicare beneficiaries - 34.1 million out of about 62.8 million with both Medicare Parts A and B - are enrolled in Medicare Advantage plans. The Congressional Budget Office projects that the share will rise to 64% by 2034.

One in five (21%) Medicare Advantage enrollees is in a special needs plan (SNP), reflecting a steady increase in recent years. Overall, Medicare Advantage enrollment is highly concentrated among plans owned by a few firms.

Also: Medicare Advantage in 2025: Premiums, Out-of-Pocket Limits, Supplemental Benefits, and Prior Authorization

Medicare Advantage Enrollees Account for 25% of Inpatient Hospital Days

Most Medicare Advantage Markets are Dominated by One or Two Insurers

Medicare Advantage Quality Bonus Payments Will Total at Least $12.7 Billion in 2025

Medicare Advantage Insurers Made Nearly 50 Million Prior Authorization Determinations in 2023

New & Noteworthy
Medicare PArt D

The Uncertain Future of Medicare's Stand-Alone PDP Market and Why It Matters

This brief discusses the uncertain future of Medicare’s Part D stand-alone prescription drug plan (PDP) market, in light of declining PDP availability, rising premiums, and the unknown fate of a temporary demonstration program designed to stabilize the market more broadly. The uncertain future of the market is especially relevant for rural areas, where nearly 6 in 10 beneficiaries are enrolled in traditional Medicare and PDPs, and where there are fewer Medicare Advantage options.

A Current Snapshot of the Medicare Part D Prescription Drug Benefit

Stand-Alone Drug Plans Cover a Larger Share of Part D Enrollees Living in the Most Rural Areas Than Medicare Advantage Plans

Key Facts About Medicare Part D Enrollment, Premiums, and Cost Sharing in 2025

Changes to Medicare Part D in 2024 and 2025 Under the Inflation Reduction Act and How Enrollees Will Benefit

Prescription Drugs

The Effect of Delaying the Selection of Small Molecule Drugs for Medicare Drug Price Negotiation

Part of a recent executive order from President Trump directs the Secretary of HHS to work with Congress to implement a change in the Medicare Drug Price Negotiation Program to delay negotiation of so-called “small molecule” drugs beyond 7 years after FDA approval under current law. If that timeframe had already been in place, more than half of the Part D drugs that were selected for price negotiation in the first or second rounds – 13 out of 25 – would not have been eligible at the time drugs were selected.

FAQs About the IRA's Medicare Drug Price Negotiation Program

Allowing Medicare to Negotiate Drug Prices Is Broadly Popular

The Facts About the $35 Insulin Copay Cap in Medicare

Enrollees in Most Rural Areas Rely More on Stand-alone Part D Plans

Data Visualization

The Facts About Medicare Spending

This interactive provides the facts on Medicare spending. Medicare, which serves 67 million people and accounts for 12 percent of the federal budget and 21 percent of national health spending, is often the focus of discussions about health expenditures, health care affordability and the sustainability of federal health programs.

Explore data on enrollment growth, Medicare spending trends overall and per person, growth in Medicare spending relative to private insurance, spending on benefits and Medicare Advantage, Part A trust fund solvency challenges, and growth in out-of-pocket spending by beneficiaries.

Related: FAQs on Medicare Financing and Trust Fund Solvency

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  • Open Enrollment: Insights from Medicare for Health Insurance Marketplaces

    Perspective

    This Policy Insight draws on the experiences of Medicare beneficiaries during Medicare’s annual enrollment period to consider whether consumers with health insurance coverage through the Affordable Care Act’s new marketplaces will shop for a better deal during their open enrollment season.

  • What’s In and What’s Out? Medicare Advantage Market Entries and Exits for 2015

    Issue Brief

    This Data Note examines the availability of plans nationwide and by state in 2015, and changes in plan availability since 2011. It documents the number and share of Medicare Advantage enrollees affected by plan withdrawals each year, the characteristics of plans that will be entering the market and characteristics of those exiting the market in 2015.

  • As Medicare’s Open Enrollment Nears, New Analyses Highlight Key Changes in Medicare Advantage and Part D Plans for 2015

    News Release

    With Medicare's 2015 open enrollment set to begin Oct. 15, two new analyses from the Kaiser Family Foundation find modest change in the total number of private Medicare Advantage plans available for 2015, and the fewest Part D prescription drug plans nationwide since the start of the drug benefit in 2006. As in previous years, changes in Medicare Advantage and Part D plan availability, premiums, cost-sharing and benefits could require some beneficiaries to find alternative coverage and lead others to pay more if they continue with their existing coverage.

  • Medicare Part D: A First Look at Plan Offerings in 2015

    Issue Brief

    This issue brief provides an overview of the Medicare Part D stand-alone prescription drug plan options available in 2015 and key changes from prior years. The analysis examines Part D plan availability, premiums, benefit design features, and low income subsidy plan availability.

  • Visualizing Health Policy: The Role of Medicare Advantage

    Other

    This September 2014 Visualizing Health Policy Infographic examines the role of private plans, such as HMOs and PPOs, in Medicare. These Medicare Advantage plans offer an alternative to traditional Medicare and provide all benefits covered under Medicare Parts A and B, and often Part D. The infographic includes data on Medicare Advantage penetration across the country. It shows the concentration of enrollment among a small number of firms and affiliates, and displays the extent to which Medicare pays more for Medicare Advantage enrollees than for beneficiaries in fee for service Medicare, on average, and that the payment differential is declining

  • Visualizing Health Policy: The Role of Medicare Advantage

    News Release

    This Visualizing Health Policy infographic provides a snapshot of the role of Medicare Advantage plans, an alternative to traditional Medicare, including information about the proportion of Medicare beneficiaries who are enrolled in Medicare Advantage plans, geographic differences in Medicare Advantage penetration, the trend of increasing enrollment in Medicare Advantage plans, and the concentration of enrollment…

  • Report Examines Trends in the Medicare Part D Plan Marketplace

    News Release

    A new comprehensive Kaiser Family Foundation report analyzes key trends that have shaped the Medicare Part D marketplace since the program launched nine years ago, providing a detailed assessment of changes in plan availability, enrollment, premiums and cost sharing in both private stand-alone drug plans, and Medicare Advantage drug plans.

  • Medicare Part D in Its Ninth Year: The 2014 Marketplace and Key Trends, 2006-2014

    Report

    This report presents findings from an analysis of the Medicare Part D marketplace in 2014 and changes in features of the drug benefit offered by Part D plans since 2006. It examines the latest information and trends related to Part D enrollment and plan availability, premiums, benefit design and cost sharing, pharmacy networks, the Low-Income Subsidy Program, and plan performance ratings.