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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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  • Visualizing Income and Assets Among Medicare Beneficiaries: Now and in the Future

    Interactive

    This interactive tool describes the income, savings and home equity of people on Medicare in 2013, and in 2030. It allows users to break out the data by age, gender, race/ethnicity, marital status and education level, providing insight into the disparities within and across categories of beneficiaries.

  • How are Seniors Choosing and Changing Health Insurance Plans?

    Report

    This report summarizes first-hand accounts of seniors’ Medicare private plan decision making strategies, based on focus groups conducted in four cities. Seniors found the initial plan selection process overwhelming due to the volume of information they received and their inability to organize it. Few used the government's online comparison tool, and those that did cite several shortcomings. Many relied on advice from sources they trust, including insurance agents, plan representatives, friends, family members, doctor's offices and pharmacists. After they enroll in a plan, many seniors did not revisit their initial decision or review plan options without the strong provocation of a substantial increase in cost, change in coverage, or shift in personal health care needs. Moreover, they feared that a change in plans may disrupt their care, or lead to an unforeseen increase in out-of-pocket costs, and require them to learn new rules and requirements. They are doubtful they would end up in a plan that is appreciatively different or better for them. Overall, seniors preferred to have numerous choices in plans but would like personalized help and advice from experts to ease the process.

  • Medicare Advantage: Take Another Look 

    News Release

    In the latest post in the Policy Insights series, Tricia Neuman and Gretchen Jacobson examine the surprising growth in Medicare Advantage enrollment following payment reductions included in the Affordable Care Act. Previous columns in the Policy Insights series are also available on kff.org.

  • Medicare Advantage: Take Another Look

    Perspective

    This Policy Insight explores possible explanations for the continued rise in Medicare Advantage enrollment between 2010 and 2013 in spite of a projected decrease following payment changes in the Affordable Care Act (ACA).

  • Medicare Advantage 2014 Spotlight: Enrollment Market Update

    Issue Brief

    This Data Spotlight provides an overview of Medicare Advantage enrollment patterns in March 2014, and examines variations by plan type, state, and firm. It also analyzes trends in premiums paid by beneficiaries enrolled in Medicare Advantage plans and describes the changes in limits on out-of-pocket expenses and prescription drug coverage in the Part D “donut hole” provided by the plans in 2014.