Every fall, millions of Medicare beneficiaries sort through glossy mailers and television commercials from Medicare Advantage insurers promising $0 premiums, dental allowances, and gym memberships. What those ads never mention is the massive federal subsidy system running quietly in the background — one that will funnel more than $13 billion in bonus payments to Medicare Advantage insurers in 2026 alone. Understanding how this money flows, and whether it actually improves your care, is one of the most consequential things you can do as a Medicare enrollee before the Annual Enrollment Period closes on December 7.
The program is called the Medicare Advantage Quality Bonus Program, and it was created with genuinely good intentions. Established under the Affordable Care Act, the concept was straightforward: pay Medicare Advantage insurers more money if they deliver higher-quality care, as measured by Medicare's star rating system. Plans that earn 4 stars or higher out of 5 receive bonus payments — technically called quality bonus payments — layered on top of their standard per-member reimbursement from the federal government. Plans rated 5 stars receive the largest bonuses. The theory was that financial incentives would push insurers to improve care coordination, reduce hospital readmissions, and keep members healthier over time.
The dollar figures involved have grown to a scale that would have been unimaginable when the program launched. According to analysis from KFF (formerly the Kaiser Family Foundation), Medicare is on track to spend more than $13 billion on these quality bonus payments in 2026. That represents a dramatic escalation from earlier years — the program paid out roughly $3 billion in bonuses in 2015, meaning spending has more than quadrupled in approximately a decade. That growth has outpaced enrollment growth in Medicare Advantage, which means the per-enrollee bonus spending has also risen substantially, even as the evidence that those dollars translate into meaningfully better care remains contested.
Data Snapshot: According to CMS.gov data, approximately 33.8 million people were enrolled in Medicare Advantage plans as of early 2025, representing more than 54% of all Medicare beneficiaries — a historic majority. CMS data also shows that in 2024, roughly 79% of Medicare Advantage enrollees were in plans rated 4 stars or higher, the threshold required to receive quality bonus payments. That high percentage is itself a point of controversy among health policy researchers: when nearly four out of five enrollees are in bonus-eligible plans, critics argue the bar may have been set too low, or that measurement methodology has been gamed, rather than reflecting a genuine across-the-board improvement in care delivery.
The star rating system is worth understanding in some detail, because it directly determines which plans receive bonus money — and which plans use that bonus money to offer richer benefits to enrollees. CMS evaluates plans on dozens of measures grouped into categories including staying healthy (screenings and vaccines), managing chronic conditions, member experience, complaints and appeals, and customer service responsiveness. Each plan receives a composite star rating from 1 to 5. A plan rated 4 stars or above qualifies for bonus payments. A plan rated exactly 5 stars carries an additional privilege: you can join it at any time of year through a Special Enrollment Period, one of the few ways to switch Medicare Advantage plans outside the Annual Enrollment Period (October 15 through December 7) or the Open Enrollment Period (January 1 through March 31). That 5-star SEP can be used only once per calendar year.
Here is where the story gets complicated for beneficiaries. When an insurer receives a quality bonus payment, it is not required to pass those dollars directly to enrollees in the form of lower premiums or richer benefits. Insurers have discretion over how to deploy the additional revenue. Some plans do use bonus dollars to reduce premiums, add supplemental benefits like vision or hearing coverage, or lower cost-sharing on prescription drugs. Others use the money to fund marketing, administrative overhead, or profit margins. Research published in health policy journals has found that the relationship between bonus payments and measurable improvements in enrollee experience is weaker than the program's designers intended. Your plan may be collecting a federal bonus check without you seeing much of that money reflected in your actual coverage.
There is also a structural concern that policy analysts have raised repeatedly: the star rating system may be measuring things that are easier to quantify rather than things that matter most to patients. A plan can score well on whether it sends automated reminder calls for annual wellness visits, but score poorly on whether members can actually get timely appointments with specialists. Patient experience surveys are part of the rating, but they carry limited weight compared to administrative process measures. This means a plan can earn 4 stars — and collect tens of millions in bonus payments — while still leaving members frustrated with access to care or prior authorization delays.
For beneficiaries choosing between plans during the Annual Enrollment Period, the star rating is a useful starting point but should not be the only factor you weigh. A 4-star plan in your county might carry a $0 monthly premium and a $3,500 annual maximum out-of-pocket limit, while a 4.5-star plan might charge a $45 monthly premium but cap your annual costs at $2,500. Depending on your health status and how frequently you use medical services, the higher-rated plan could actually cost you more over the course of a year. The Medicare Plan Finder at Medicare.gov allows you to enter your specific prescriptions, preferred doctors, and zip code to generate a side-by-side comparison of plans available in your area — including their star ratings, premiums, deductibles, drug formulary tiers, and estimated total annual costs. That estimated annual cost figure, which accounts for both premiums and expected cost-sharing, is often more revealing than the star rating alone.
The $13 billion bonus program also has implications for the broader Medicare budget and for taxpayers. Medicare Advantage plans are paid a per-member, per-month rate by the federal government, and quality bonus payments are layered on top of that base rate. Multiple independent analyses, including work from the Medicare Payment Advisory Commission (MedPAC), have found that Medicare Advantage plans are paid more per enrollee than it would cost to cover the same person under traditional Medicare. The bonus program amplifies that overpayment. MedPAC has recommended that Congress reconsider the size and structure of the bonus payments, arguing that the current system rewards plans for meeting administrative benchmarks rather than demonstrating genuine clinical superiority. Defenders of the program counter that Medicare Advantage plans provide supplemental benefits — dental, vision, hearing, transportation — that traditional Medicare does not cover, and that those benefits justify higher federal payments.
What does this mean practically if you are currently enrolled in a Medicare Advantage plan or considering one for 2026? First, do not assume a high star rating means the plan is the best fit for your specific medical needs. A plan can earn 4.5 stars while maintaining a narrow network that excludes your preferred cardiologist or a drug formulary that places your maintenance medications on a high-cost tier. Always verify that your specific doctors are in-network and that your drugs are covered at an acceptable cost-sharing level before you enroll. Second, be aware that plan benefits change every year. A plan that offered a $500 dental allowance in 2025 may have reduced that to $300 in 2026, or changed its premium by $20 per month. The Annual Notice of Change that your plan is required to mail each September details every change to premiums, cost-sharing, and benefits for the coming year. Read it carefully rather than setting it aside.
Third, if your plan has been rated below 3 stars for three consecutive years, CMS has the authority to terminate that plan's Medicare contract, which would require you to find new coverage. CMS publishes a list of low-performing plans, and if your plan appears on it, that is a clear signal to shop during the Annual Enrollment Period rather than waiting. You can check your plan's current star rating at Medicare.gov/plan-compare or by calling 1-800-MEDICARE (1-800-633-4227), which is staffed 24 hours a day, 7 days a week. State Health Insurance Assistance Programs (SHIPs) also offer free, one-on-one counseling to help you compare plans — find your local SHIP at shiphelp.org.
It is also worth knowing that the quality bonus program is not static. CMS has proposed and implemented various adjustments to the star rating methodology over the years, including changes to how patient experience surveys are weighted and how plans are evaluated on health equity measures. There is ongoing policy debate about whether the program should be restructured, scaled back, or made more rigorous. AARP has called for stronger accountability measures to ensure bonus payments translate into better care rather than higher insurer profits. How those debates resolve will shape what Medicare Advantage plans look like — and what they cost the federal government — in the years ahead.
For now, the most actionable steps you can take are these: treat star ratings as one data point among several, use the Medicare Plan Finder to run a genuine cost comparison during open enrollment, read your Annual Notice of Change every September, and call 1-800-MEDICARE or your local SHIP counselor if you have questions about a specific plan. The more than $13 billion flowing through the Quality Bonus Program is funded by taxpayers and Medicare trust funds. Understanding how it works puts you in a stronger position to choose a plan that actually delivers value for your health — not just a plan that delivers value for its insurer.