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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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  • KFF Analysis: Number of Coronavirus Cases, Distribution of $30B in CARES Act funding and Medicare Advantage Penetration by State

    Fact Sheet

    Number of Coronavirus Cases, Distribution of $30B in CARES Act funding and Medicare Advantage Penetration by StateStateNumber ofCOVID-19 Cases on April 21, 2020Percent of Total COVID-19 CasesFirst Distribution of CARES Act PaymentsPercent of Total Money DistributedPercent of Medicare Beneficiaries in Medicare Advantage, 2020New York253,400.0032.1%$1,859,574,4346.2%40%New Jersey88,806.0011.3%$919,426,8013.1%29%Massachusetts39,643.005.0%$841,425,1202.8%23%Pennsylvania34,005.004.3%$1,246,250,0764.2%41%California33,866.004.3%$2,920,960,7339.7%40%Michigan32,000.004.1%$936,700,1393.1%42%Illinois31,508.004.0%$1,204,103,1804.0%25%Florida27,058.003.4%$2,220,563,1377.4%43%Louisiana24,523.003.1%$474,891,7351.6%38%Connecticut19,815.002.5%$377,981,2571.3%41%Texas20,087.002.5%$2,089,066,4527.0%37%Georgia19,398.002.5%$792,069,1602.6%37%Maryland14,193.001.8%$742,225,3062.5%11%Ohio12,919.001.6%$989,773,4173.3%39%Washington12,486.001.6%$553,838,8061.8%33%Indiana11,688.001.5%$668,604,6142.2%32%Colorado10,112.001.3%$360,905,4821.2%38%Virginia9,097.001.2%$814,360,4672.7%21%Tennessee7,238.000.9%$739,723,3472.5%38%North Carolina6,979.000.9%$919,171,0873.1%36%Missouri5,963.000.8%$618,601,1672.1%35%Rhode Island5,090.000.6%$90,459,8340.3%39%Arizona5,068.000.6%$707,587,4822.4%39%Alabama5,092.000.6%$449,481,9451.5%41%Mississippi4,512.000.6%$374,847,7901.2%20%Wisconsin4,541.000.6%$471,681,0771.6%42%South Carolina4,439.000.6%$518,022,4631.7%28%Nevada3,830.000.5%$241,471,8410.8%36%Utah3,213.000.4%$185,292,4220.6%36%Iowa3,159.000.4%$297,929,1711.0%22%Kentucky3,050.000.4%$452,761,1711.5%34%District of Columbia3,098.000.4%$84,989,0990.3%20%Delaware2,745.000.3%$154,114,1180.5%17%Oklahoma2,680.000.3%$489,853,9981.6%22%Minnesota2,470.000.3%$472,206,1221.6%43%Kansas2,070.000.3%$325,135,9501.1%19%Oregon1,956.000.2%$291,029,0251.0%42%Arkansas1,990.000.3%$326,536,0431.1%26%New Mexico1,971.000.2%$169,486,1320.6%35%South Dakota1,685.000.2%$107,650,2010.4%19%Idaho1,736.000.2%$135,028,0560.5%33%Nebraska1,648.000.2%$225,027,9120.8%17%New Hampshire1,447.000.2%$164,580,3860.5%19%Puerto Rico1,298.000.2%$41,889,8220.1%70%West Virginia908.000.1%$246,574,8510.8%31%Maine875.000.1%$145,763,8120.5%36%Vermont816.000.1%$54,457,8700.

  • Medicare Beneficiaries Without Supplemental Coverage Are at Risk for Out-of-Pocket Costs Relating to COVID-19 Treatment

    Policy Watch

    Most Medicare Advantage enrollees are in plans that have waived cost sharing for COVID-19 treatment, and many other beneficiaries in traditional Medicare have their cost sharing covered by supplemental insurance. This blog post discusses the 6 million Medicare beneficiaries without supplemental coverage who would face out-of-pocket costs if they require treatment for COVID-19.

  • Compare Medicare-for-all and Public Plan Proposals

    Interactive

    This side-by-side interactive compares 10 bills to expand public health coverage through Medicare-for-All, a public option and other approaches, that have been introduced in the current Congress. The interactive allows users to compare these proposals across a number of dimensions, including eligibility, benefits, cost sharing, provider payments, and more.