Why Your Medicare Plan's Costs and Benefits May Change Each Year
Keeping the same Medicare plan doesn't necessarily mean keeping the same coverage. Medicare Advantage and Part D plans can change their premiums, deductibles, copayments, provider networks, prescription coverage, and other benefits from one year to the next.
For beneficiaries, this can make the Annual Enrollment Period (AEP) an important time to review coverage. The Medicare Annual Enrollment Period runs from October 15 through December 7, and changes made during this period generally take effect January 1 of the following year.
For the 2026 AEP, beneficiaries will be reviewing coverage for 2027.
Understanding why these changes happen, and knowing where to look for them, can make it easier to decide whether your current plan still meets your needs.
Why Don't Medicare Plans Stay the Same?
Medicare plans operate within rules established by the federal government, but private insurers that offer Medicare Advantage and Part D plans make decisions about how their plans are structured within those rules.
Healthcare costs, prescription drug costs, provider contracts, plan participation, government policies, and other factors can influence how a plan is designed for the upcoming year.
Medicare explains that Medicare Advantage plans set their premiums, deductibles, and cost-sharing amounts each year. These amounts can change from one year to another.
The same basic principle applies to Part D plans. Premiums and other prescription costs can vary depending on the plan and can change from year to year.
This doesn't necessarily mean your plan is becoming worse, or better.
It simply means that your plan for the new year should be reviewed based on the coverage and costs that will actually apply.
Your Annual Notice of Change Explains What's Different
One of the most important documents to watch for each fall is your Annual Notice of Change (ANOC).
Medicare says plans send the ANOC each fall, generally in September. The document explains changes in coverage, costs, and other plan details that will take effect in January.
This document is designed to help you evaluate whether your current plan will continue to meet your needs.
Belle Vida's ANOC Letter guide recommends looking specifically for changes involving deductibles, premiums, copayments or coinsurance, formularies, and provider or pharmacy networks.
These are practical areas to focus on because even a seemingly small change can matter if you use that particular service or medication frequently.
Premiums Can Change
Your Medicare plan's monthly premium may change for the upcoming year.
For Medicare Advantage plans, some plans charge an additional monthly premium while others may have a $0 plan premium. However, even with a $0 Medicare Advantage plan premium, beneficiaries generally still have to pay their Medicare Part B premium.
Part D premiums also vary by plan.
When reviewing a premium change, don't automatically assume that a higher premium means the plan is no longer a good value.
A plan with a higher premium could potentially offer benefits or cost-sharing arrangements that work better for your healthcare needs.
Likewise, a lower premium doesn't necessarily mean you'll spend less overall.
That's why premiums should be reviewed alongside deductibles, copayments, coinsurance, prescription costs, and other expenses.
Deductibles and Copayments May Change
Your plan's deductible is another area that can change from year to year.
A deductible is the amount you may have to pay before the plan begins paying for certain covered services.
Copayments and coinsurance can also change.
For example, a plan might increase the copayment for a specialist visit or change the amount you pay for certain outpatient services.
Medicare confirms that Medicare Advantage plans can set their own premiums, deductibles, and cost-sharing amounts within Medicare's rules, and these amounts can vary by plan.
This is why looking only at your monthly premium can give you an incomplete picture of your actual healthcare costs.
Provider Networks Can Change
Your healthcare providers are another important consideration.
Medicare Advantage plans often use networks of doctors, specialists, hospitals, and other healthcare providers. The providers participating in a plan can change.
Medicare explains that Medicare Advantage plans can have different rules regarding how beneficiaries receive care, including whether they must use doctors and facilities in the plan's network for certain services.
This means you shouldn't assume that your preferred doctor will remain in your plan's network simply because you've been seeing them for several years.
When your ANOC arrives, check your important providers again.
Belle Vida also recommends confirming that your physicians and specialists remain in-network when reviewing your annual plan changes.
Prescription Drug Coverage Can Change
For people who rely on prescription medications, changes to drug coverage can be especially important.
Part D plans maintain formularies that determine which medications are covered and how they are categorized. Drug tiers can affect the amount you pay for a prescription.
Plans may also have rules such as prior authorization, step therapy, or quantity limits for certain medications.
Medicare explains that actual prescription costs can depend on the medications you take, whether they're included on the plan's drug list, and the pharmacy you use.
This is one reason your medication list should be part of your annual Medicare review.
If your prescriptions have changed since last year, your plan comparison should reflect your current medications rather than an older list.
Supplemental Benefits May Change Too
Medicare Advantage plans may offer supplemental benefits beyond Original Medicare.
Depending on the plan, these may include dental, vision, hearing, fitness, transportation, over-the-counter allowances, or other services.
However, supplemental benefits aren't necessarily permanent.
A plan may modify the benefit, change eligibility requirements, reduce the amount available, or discontinue a benefit for the new plan year.
This doesn't mean supplemental benefits are unreliable. It simply means they should be reviewed annually.
Think about the benefits you actually use.
If your plan offers a dental benefit that you rely on, review the new year's coverage rather than assuming the benefit will work exactly the same way.
Healthcare Costs and Provider Contracts Can Influence Plans
Healthcare providers and insurers negotiate contracts that help determine how services are reimbursed.
Changes in those relationships can affect which providers participate in a Medicare Advantage plan.
At the same time, healthcare costs can influence how insurers structure premiums and cost-sharing.
These factors can be particularly important in areas where healthcare systems, physician groups, and insurance plans are negotiating new arrangements.
For beneficiaries, the practical lesson is not to try to predict every change in the healthcare market.
Instead, focus on what has actually changed in your plan.
Your ANOC and Evidence of Coverage provide much more useful information for your individual decision than general assumptions about the healthcare industry.
Federal Medicare Rules Can Also Change
Medicare plans don't operate in isolation.
Each year, the Centers for Medicare & Medicaid Services (CMS) establishes rules and payment policies affecting Medicare Advantage and Part D plans.
For 2027, CMS finalized changes affecting Medicare Advantage and Part D, including updates to Star Ratings, enrollment processes, and implementation of Medicare Part D provisions from the Inflation Reduction Act.
CMS also finalized 2027 Medicare Advantage and Part D payment policies, with an expected average increase of 2.48% in payments to Medicare Advantage plans compared with 2026. This is a payment change to plans, not a guarantee that individual beneficiaries will receive lower premiums or richer benefits.
This distinction is important.
A federal policy change can influence how plans operate, but it doesn't automatically mean every beneficiary will experience the same change.
Your individual plan's documents remain the best source for understanding your actual 2027 coverage.
The Evidence of Coverage Provides More Detail
The ANOC gives you a useful overview of what's changing, but your Evidence of Coverage (EOC) provides more detailed information.
Medicare says plans send the EOC each year, usually in September. It explains what the plan covers, how much you pay, and other important coverage rules.
Think of the documents as serving different purposes.
The ANOC helps you identify what is changing.
The EOC helps you understand the details of how the plan works.
If you see a change in your ANOC that concerns you, consult the EOC for additional information.
Why You Shouldn't Compare Plans Based Only on Premiums
One of the most common mistakes during AEP is choosing a plan based primarily on the monthly premium.
A Medicare plan with a low premium can still result in higher overall healthcare costs if it has higher copayments, less favorable prescription coverage, or a provider network that doesn't include your preferred doctors.
Medicare recommends considering the overall costs and coverage of available plans rather than focusing on one factor.
Instead of asking:
"Which plan has the lowest premium?"
Consider asking:
"Which plan is most likely to work well with the healthcare I actually use?"
That means considering your doctors, prescriptions, healthcare facilities, expected medical services, and budget together.
What If Your Current Plan Changes Too Much?
If you review your ANOC and discover significant changes, you have options during AEP.
The Medicare Annual Enrollment Period runs from October 15 through December 7. During this period, eligible beneficiaries can make certain changes to their Medicare Advantage and Part D coverage, with changes generally taking effect January 1.
You don't have to automatically accept changes to your current plan.
You can compare other available plans and determine whether another option better fits your needs.
However, don't switch solely because one feature changed.
Look at the entire plan.
A different plan might offer a lower premium but have a narrower provider network or less favorable prescription coverage.
What If Your Plan Doesn't Change Much?
Not every year brings major changes.
You may receive your ANOC and discover that your premium, providers, medications, and benefits remain suitable for your needs.
In that situation, staying with your current plan may be the right decision.
The purpose of AEP isn't to encourage everyone to switch.
It's an opportunity to review your coverage and make an informed decision.
Medicare specifically advises beneficiaries to review annual changes and decide whether their current plan will continue to meet their needs.
Sometimes the best Medicare decision is staying where you are.
A Simple Annual Review
When your Medicare plan documents arrive, create a simple review checklist.
Start with your premium.
Then check your deductible and copayments.
Review your doctors and specialists.
Check your prescriptions and pharmacy.
Review important supplemental benefits.
Finally, think about whether your healthcare needs are likely to change during the upcoming year.
This process doesn't have to take place all at once.
You can review the ANOC first, identify questions, and then use the EOC or Medicare's plan comparison tools to investigate further.
Conclusion
Medicare plans can change each year because healthcare costs, provider arrangements, prescription coverage, federal rules, and plan designs can change.
For beneficiaries, the important thing isn't to predict every possible change. It's to understand how those changes affect the coverage you actually use.
During the 2026 AEP, review your 2027 plan carefully. Start with your Annual Notice of Change, then look at your Evidence of Coverage for additional details.
Pay particular attention to premiums, deductibles, copayments, provider networks, prescription coverage, and supplemental benefits.
And remember that a change doesn't automatically mean you need to leave your plan.
The goal of an annual Medicare review is to make an informed choice, whether that means changing plans or staying with the coverage you already have.
Medicare says plans generally send the ANOC in September, before the October 15 start of Open Enrollment.
Review Your Medicare Coverage With Confidence
Medicare plan changes can be difficult to understand when you're looking at premiums, benefits, providers, and prescription coverage all at once. If you have questions about your Medicare options or want help understanding how plan changes may affect you, schedule a consultation.
For more educational information about Medicare and health insurance, visit Belle Vida Insurance.