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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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  • How Pending Health-Related Lawsuits Could be Impacted by the Incoming Trump Administration

    Issue Brief

    This brief provides an overview of current lawsuits in health policy including preventive services, abortion care, gender affirming care, Medicare drug price negotiations, nursing home staffing rules, private coverage consumer protections, and protections and health coverage for Deferred Action for Childhood Arrivals (DACA) recipients; how they may be affected by the incoming Trump administration; and the implications of their potential outcomes.

  • Marketing Medicare – How Health Insurers and Brokers Use TV Ads to Attract Enrollees

    Event Date:
    Event

    KFF held a web event on September 20, 2023 to discuss Medicare marketing practices in advance of the open enrollment period, which begins Oct. 15. As part of the event, KFF released a new analysis of television ads that aired during last year’s open enrollment season and share insights from focus groups with enrollees about their perceptions of the marketing efforts.

  • Medicare Advantage Enrollment, Plan Availability and Premiums in Rural Areas

    Issue Brief

    Medicare Advantage enrollment is lower, but has grown more rapidly in recent years in rural areas than in metropolitan areas. In 2023, nearly 40% of eligible Medicare beneficiaries in rural areas are in Medicare Advantage. Rural Medicare beneficiaries can choose from 27 Medicare Advantage plans on average and most are enrolled in a plan that charges no additional premium.

  • The 4 Arguments You Will Hear Against Drug Price Negotiation

    Perspective

    As the Biden administration begins the process of negotiation drug prices for Medicare as authorized in the Inflation Reduction Act, KFF's Larry Levitt probes some of the arguments against it and the policy and political implications of the debate in this New York Times op-ed column.

  • Probing the Legal Arguments in the Drug Industry’s Challenges to Medicare Drug Price Negotiations

    Event Date:
    Event

    With the Biden administration’s announcement of the first 10 drugs to be negotiated for Medicare as part of the Inflation Reduction Act (IRA), an array of legal challenges from the pharmaceutical industry is potentially the biggest obstacle to implementation. On Tuesday, September 12, two legal experts and a health policy expert joined Larry Levitt, executive vice president for health policy at KFF, for a 45-minute discussion about the legal issues underpinning these lawsuits and how they intersect with the policy goals of the legislation.

  • How Health Insurers and Brokers Are Marketing Medicare

    Report

    To capture the state of television marketing activities and consider the implications for people with Medicare, KFF analyzed ad data compiled by the Wesleyan Media Project, that were obtained from Vivvix (formerly Kantar) CMAG, a data analytics and consulting firm, and were coded by the Wesleyan Media Project in collaboration with KFF. The data set included all English-language TV ads that aired across national and local markets on broadcast television or national cable, from October 1st, 2022, through December 7th, 2022, the period that includes the Medicare open enrollment period for coverage in 2023.

  • What Do People with Medicare Think About the Role of Marketing, Shopping for Medicare Options, and Their Coverage?

    Report

    To capture Medicare beneficiaries’ views and experiences in choosing between traditional Medicare and private plans, and among private plans, and the factors that influence these decisions, KFF worked with PerryUndem to conduct focus groups with Medicare beneficiaries in the Fall of 2022, during the annual Medicare open enrollment period. This report summarizes first-hand accounts of participants’ reactions open enrollment advertising and factors that influence their decision-making around Medicare plan choice.