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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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  • A Gender Gap in Economic Security for Seniors

    News Release

    Following up on an earlier column for The Wall Street Journal's Think Tank on seniors and poverty, Drew Altman looks at why older women will be more at risk of economic insecurity than men in the future. All previous columns by Drew Altman are available.

  • A Gender Gap in Economic Security for Seniors

    From Drew Altman

    Following up on an earlier column for The Wall Street Journal's Think Tank on seniors and poverty, Drew Altman looks at why older women will be more at risk of economic insecurity than men in the future.

  • What is Medicare’s Role in End-of-Life Care?

    News Release

    Medicare plays an integral role in end-of-life care, an issue that is emotionally-charged and easily politicized.  About three-quarters of the 2.5 million Americans who die each year are ages 65 and older, and covered by Medicare at the time of their death, yet policy issues related to Medicare and end-of-life care are often poorly understood.

  • KFF Articles in the Journal Generations: Medicare at 50

    Report

    Published in a special Summer 2015 edition of the journal Generations on Medicare's 50th anniversary, these six articles by KFF staff reflect on Medicare’s history, evolution and future, including a look at lessons and challenges, the Medicare and Medicaid partnership, coverage, the role of private plans, Medicare's role for women, and the public opinion about the program.

  • Seniors and Income Inequality: How Things Get Worse With Age

    News Release

    In his latest column for The Wall Street Journal’s Think Tank, Drew Altman discusses why seniors need to be included in the national discussion on income inequality, especially as proposals to change Medicare and Social Security are considered. All previous columns by Drew Altman are available.

  • Seniors and Income Inequality: How Things Get Worse With Age

    From Drew Altman

    In this column for The Wall Street Journal’s Think Tank, Drew Altman discusses why seniors need to be included in the national discussion on income inequality, especially as proposals to change Medicare and Social Security are considered.

  • Medicare’s Income-Related Premiums: A Data Note

    Issue Brief

    This data note presents new information to help set a context for understanding the implications of recent changes to Medicare's income-related premiums incorporated in the Medicare Access and CHIP Reauthorization Act of 2015 (MACRA), a new law to repeal and replace Medicare's Sustainable Growth Rate (SGR) formula for physician payments. It describes current requirements with respect to the income-related premiums under Medicare Part B and Part D, including the number and share of Medicare beneficiaries who are estimated to pay income-related premiums and revenues raised from the income-related premium, based on data from the Centers for Medicare and Medicaid Services (CMS) Office of the Actuary (OACT). It also explains the recently enacted changes in MACRA that will affect some higher-income people on Medicare who are already paying income-related premiums, beginning in 2018.