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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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  • 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.

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

    Issue Brief

    Federal spending on the Medicare Advantage quality bonus program has more than quadrupled since 2015, rising to at least $12.7 billion in 2025. Most Medicare Advantage enrollees are in a plan that receives a bonus payment in 2025, with employer- and union-sponsored plans receiving the highest bonus payments and special needs plans receiving the lowest bonus payments, on average.

  • 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.

  • Medicare Advantage 2020 Spotlight: First Look

    Issue Brief

    In 2020, more than 22 million Medicare beneficiaries (34%) are enrolled in Medicare Advantage plans, which are mainly HMOs and PPOs offered by private insurers as an alternative to the traditional Medicare program. This data note provides an overview of the Medicare Advantage plans that will be available in 2020, including the variation in the number of plans available by county and plan type. The brief also examines the insurers entering the Medicare Advantage market for the first time and also examines the insurers exiting the market.

  • Medicare Part D: A First Look at Prescription Drug Plans in 2020

    Issue Brief

    This issue brief provides an overview of the Medicare Part D prescription drug benefit plan landscape for 2020, with a focus on stand-alone drug plans, the largest segment of the Part D market. It includes national and state-level data on plan availability, premiums, benefit design, cost sharing, information about premium-free plans for low-income beneficiaries, and information about the national Part D plans available in 2020.