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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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  • Reading the Stars: Nursing Home Quality Star Ratings, Nationally and by State

    Issue Brief

    This issue brief presents national and state-level analysis of nursing homes based on the Five-Star Quality Rating System, recently updated by the Centers for Medicare and Medicaid Services (CMS) to help consumers compare nursing homes when selecting one for themselves or their family members. The issue brief finds that more than one-third (36%) of the nation’s 15,500 nursing homes certified by Medicare or Medicaid received relatively low ratings of 1 or 2 stars (out of a possible 5 stars). In 11 states, at least 40 percent of nursing homes in the state have 1- or 2-star ratings. In 23 states, however, at least half of the nursing homes have 4- or 5- star ratings. This issue brief discusses relevant policy considerations regarding nursing home quality—a serious issue in light of the vulnerability of the nursing home population and recent reports of problems arising from inadequate staffing, fire safety hazards, and substandard care.

  • Medicare: An Overview

    Feature

    This slideshow explains key elements of the Medicare program, which now provides health coverage to 55 million people — including 46 million people age 65 and older and another 9 million younger adults with permanent disabilities.

  • Demonstrations to Improve the Coordination of Medicare and Medicaid for Dually Eligible Beneficiaries: What Prior Experience Did Health Plans and States Have with Capitated Arrangements?

    Report

    This report examines the Center for Medicare and Medicaid Services (CMS) financial alignment demonstration for beneficiaries dually eligible for Medicare and Medicaid, with a focus on the extent to which participating states and health plans have prior experience with capitated managed care arrangements under Medicare or Medicaid, and specifically for this population. Under these capitated financial alignment demonstrations, health plans contract with the state and CMS (a three-way contract) to provide both Medicare and Medicaid benefits to dually eligible beneficiaries. These demonstrations aim to improve the quality of care and the coordination of benefits for people dually eligible for Medicare and Medicaid. The report finds considerable variation in the experience of states and health plans participating in these demonstrations, and discusses the potential implications for beneficiaries and plan oversight.

  • Public vs. Private Health Insurance on Controlling Spending

    News Release

    In his latest column for The Wall Street Journal's Think Tank, Drew Altman analyzes whether public or private health insurance does a better job of controlling costs. All previous columns by Drew Altman are available online.

  • Medicare and Medicaid at 50

    Video

    With Medicare and Medicaid turning 50 this year, this updated video provides a brief history of both programs, including: an examination of the health care, social and political landscape that gave rise to them, the significant ways each program has evolved over five decades, and the important roles they play in the U.S. health care system. The video includes archival footage, as well as commentary and perspective from policymakers, government officials and experts.

  • Medigap and the Medicare “Doc Fix”

    News Release

    The House-passed legislation to repeal the Medicare Sustainable Growth Rate (SGR) includes a provision that would prohibit Medicare supplemental insurance (Medigap) policies from covering the Part B deductible for people who become eligible for Medicare beginning in 2020.