Medicare Open Enrollment 2026: Everything You Need to Know Before the Deadline

Every year, millions of seniors and Medicare beneficiaries get the chance to review their health coverage, and 2026 is shaping up to be one of the most important years to pay attention. From rising Part B premiums to a new out-of-pocket cap on prescription drugs, the changes for 2026 are significant enough that simply staying on autopilot with your current plan could cost you hundreds, even thousands of dollars. 

This guide walks you through exactly what Medicare Open Enrollment 2026 means for you: the critical dates, what has changed, how to compare your plan options, and the smartest moves to make before the deadline 

Whether you are on Original Medicare, a Medicare Advantage plan, or a Part D prescription drug plan, this is the one time of year you can make changes that go into effect on January 1, 2026.

What Is Medicare Open Enrollment?

Medicare Open Enrollment, officially called the Annual Enrollment Period (AEP), is the federally designated window each year when anyone already enrolled in Medicare can review, change, or update their health insurance coverage.

During this period, you can:

•  Switch from Original Medicare (Parts A & B) to a Medicare Advantage (Part C) plan
• Switch from Medicare Advantage back to Original Medicare
• Change from one Medicare Advantage plan to another
• Join, drop, or switch a Medicare Part D prescription drug plan

It is important to note: Medicare Open Enrollment is NOT the same as the initial enrollment when you first become eligible for Medicare. This annual window is exclusively for beneficiaries who are already enrolled and want to make changes for the coming year.

Pro Tip: Even if you are happy with your current plan, it is worth reviewing it every year. Plans can change their premiums, drug formularies, and provider networks annually, so what worked last year may not be the best option in 2026.

 Medicare Open Enrollment 2026: Key Dates at a Glance

There are multiple enrollment windows throughout the year, but the Annual Enrollment Period is the most flexible and widely used:

Annual Enrollment Period (AEP)  October 15 to December 7, 2025

This is the primary window to make changes to your Medicare coverage that take effect on January 1, 2026. You can change your mind multiple times during this period, but only the final selection you make by December 7 will take effect. 

Medicare Advantage Open Enrollment Period (MA OEP)  January 1 to March 31, 2026

If you are already enrolled in a Medicare Advantage plan and are unhappy with your choice, this window gives you a second chance. However, this period is more restricted; you can only make one change, and you must already be in a Medicare Advantage plan to use it.

 5-Star Special Enrollment Period

If a Medicare Advantage or Part D plan in your area has earned a 5-star overall rating from CMS, you can switch to it during the December 8, 2025, through November 30, 2026 window, but only once.

Need help understanding all enrollment windows? Read our guide to Medicare Advantage Plans to compare your options.

 What Changed for Medicare in 2026?

2026 brings several noteworthy updates to Medicare costs and benefits. Here is a complete overview so you are not caught off guard:

 Medicare Part B Premium & Deductible Changes in 2026

One of the most talked-about changes for 2026 is the increase in the Medicare Part B monthly premium.

This marks the third consecutive year where Part B premium increases have outpaced the Social Security Cost of Living Adjustment (COLA), which means those relying solely on Social Security may feel a tighter squeeze on their monthly budget. 

If you are enrolled in Medicare Advantage (Part C), your premiums may be different from the standard Part B premium. In fact, the average Medicare Advantage plan premium for 2026 has actually decreased to approximately $14.00/month, down from $16.40 in 2025.

 Want to explore Medicare Advantage as a lower-cost alternative? Compare plans on AHiX Marketplace and find one that fits your budget.

Medicare Part D Prescription Drug Changes for 2026

This is where 2026 brings some of the biggest and most impactful changes for beneficiaries, particularly those who take expensive medications. 

New Out-of-Pocket Cap: $2,100

Thanks to the Inflation Reduction Act of 2022, Medicare Part D now has an annual out-of-pocket cap. For 2026, that cap is $2,100, up slightly from $2,000 in 2025. Once you reach $2,100 in out-of-pocket drug costs (including your deductible, copays, and coinsurance), you pay $0 for the rest of the year on covered drugs.

This change is significant because it eliminates what was once known as the ‘catastrophic cliff,’  a provision where older Medicare rules left seniors paying 5% of drug costs indefinitely, even for very expensive cancer or specialty medications.

Part D Deductible Increases

The maximum Part D deductible for 2026 is $615, up from $590 in 2025. However, many plans offer lower deductibles or none at all. Be sure to review your specific plan.

Negotiated Drug Prices Take Effect in 2026

For the first time, 10 prescription drugs selected for price negotiation under the Inflation Reduction Act will have new, lower prices available to Medicare Part D enrollees in 2026. These drugs treat conditions including diabetes, autoimmune diseases, heart failure, and cancer. The federal government estimates these negotiations will save beneficiaries and the program billions of dollars annually once fully implemented.

Medicare Prescription Payment Plan

If you were enrolled in the Medicare Prescription Payment Plan in 2025 and did not change plans, you were automatically re-enrolled for 2026. This program lets you spread your out-of-pocket prescription drug costs across monthly installments rather than paying everything at the pharmacy at once, which can help with cash flow management.

 If you take high-cost specialty medications, the $2,100 out-of-pocket cap could save you thousands of dollars compared to what you would have paid before the Inflation Reduction Act changes.

 Medicare Advantage Plan Changes for 2026

Medicare Advantage, also known as Part C, continues to be the most popular alternative to Original Medicare, with approximately 5,600 plans available nationwide in 2026. However, beneficiaries should be aware of some important shifts:

 Some Plans Are Trimming Benefits

Experts noted ahead of 2026 that many Medicare Advantage insurers were expected to reduce or eliminate certain supplemental benefits such as dental, vision, hearing, gym memberships, and over-the-counter allowances due to financial pressures facing private insurers. Major carriers, including UnitedHealthcare, also reduced their plan offerings compared to 2025.

Maximum Out-of-Pocket Limit Slightly Decreased

The maximum out-of-pocket limit for Medicare Advantage plans saw a slight decrease in 2026, giving beneficiaries somewhat better financial protection in high-usage years.

Average Premiums Are Down

Despite benefit reductions in some areas, the average Medicare Advantage monthly premium dropped to approximately $14.00 in 2026, a positive development for cost-conscious beneficiaries.

 Explore how Medicare Advantage plans are shifting in 2026 in our related post: Medicare Changes 2026: What Every Beneficiary Needs to Know

Original Medicare vs. Medicare Advantage in 2026: Which Is Right for You?

Choosing between Original Medicare and Medicare Advantage is one of the most important decisions you will make during open enrollment. Here is a straightforward comparison:

The right choice depends on your health needs, budget, preferred doctors, and medications. A licensed insurance agent at AHiX can help you compare your specific situation at no cost to you.

 How to Switch or Change Your Medicare Plan During Open Enrollment

Making a change during Medicare Open Enrollment is simpler than many people expect. Here is a step-by-step approach:

Step 1: Review Your Annual Notice of Change (ANOC)

Every September, your current Medicare plan is required to send you an Annual Notice of Change (ANOC). This document outlines every change to your coverage, premiums, network, and formulary taking effect January 1. Read it carefully, do not set it aside.

Step 2: List Your Current Healthcare Needs

Make a list of your regular doctors, specialists, hospitals, and all prescription medications (including doses). This checklist will be the foundation for comparing plans. 

Step 3: Use Medicare’s Plan Finder Tool

Visit Medicare.gov/plan-compare to compare available plans in your ZIP code. You can filter by cost, drug coverage, star ratings, and provider networks. This free tool is updated each fall for the new plan year.

Step 4: Verify Provider Networks and Drug Formularies

Before enrolling in any Medicare Advantage or Part D plan, confirm that your specific doctors and medications are covered under that plan’s network and formulary. Network changes are one of the top reasons seniors are caught off guard. 

Step 5: Enroll by December 7

Once you have made your decision, enroll online at Medicare.gov, call 1-800-MEDICARE, or work with a licensed insurance broker. The deadline for changes to take effect January 1, 2026, is December 7, 2025.

 You can change your plan multiple times during the Annual Enrollment Period. Only the last plan selection you make before December 7 will take effect.

 Not sure where to start? The AHiX Marketplace connects you with licensed agents who can compare plans on your behalf at no cost to you.

 Common Mistakes to Avoid During Medicare Open Enrollment 2026

• Not reviewing your plan every year: Plans change annually. Staying on autopilot can cost you.
•  Ignoring the Annual Notice of Change: This document tells you exactly what is different; read it every fall.
•  Focusing only on premiums: A low-premium plan may have high deductibles or exclude your medications.
•  Not checking if your doctors are still in-network: Provider networks can change year to year.
•  Missing the December 7 deadline: Miss it, and you may be locked into your current plan for another full year.
•  Forgetting the Medicare Advantage Open Enrollment Period: If you miss the fall AEP, the MA OEP (January 1 – March 31) gives you a second chance.
• Not checking for Extra Help (Low-Income Subsidy): If your income is limited, you may qualify for significant savings on Part D costs. 

Frequently Asked Questions 

1. When is Medicare Open Enrollment 2026?

Medicare Open Enrollment for 2026 coverage ran from October 15 to December 7, 2025. All changes made during this period took effect on January 1, 2026. If you missed this window, the Medicare Advantage Open Enrollment Period (January 1 – March 31, 2026) may give you a second chance to make certain changes.

2. What is the Medicare Part B premium for 2026?

The standard Medicare Part B monthly premium for 2026 is $202.90, a $17.90 increase from $185.00 in 2025. This represents a 10% increase. Higher-income beneficiaries may pay more due to IRMAA (Income-Related Monthly Adjustment Amount) surcharges.

3. What is the Medicare Part D out-of-pocket cap for 2026?

The Medicare Part D out-of-pocket cap for 2026 is $2,100. This means once you have spent $2,100 in out-of-pocket costs on covered prescription drugs (including your deductible, copays, and coinsurance), you pay $0 for the remainder of the year. This cap was $2,000 in 2025.

4. Can I switch from Medicare Advantage back to Original Medicare?

Yes. During the Annual Enrollment Period (October 15 – December 7), you can switch from Medicare Advantage back to Original Medicare. You can also make this switch during the Medicare Advantage Open Enrollment Period (January 1 – March 31). If switching to a Medigap supplement plan, be aware that acceptance is not guaranteed after your initial Medigap enrollment window unless you have guaranteed issue rights.

5. Are Medicare Advantage plans getting worse in 2026?

Some Medicare Advantage plans reduced supplemental benefits like dental, vision, and over-the-counter allowances for 2026 due to financial pressures on private insurers. However, average premiums decreased to approximately $14.00/month. The key is to compare specific plans in your area rather than assuming your current plan offers the same benefits it did in 2025.

6. What drugs have negotiated prices under Medicare Part D in 2026?

Ten prescription drugs selected in the first round of Medicare price negotiations targeting conditions like diabetes, heart failure, cancer, and autoimmune diseases have new, lower prices taking effect for Part D enrollees in 2026. CMS estimates these negotiations will generate billions in savings for enrollees and the Medicare program.

7. What is the Medicare Part D deductible for 2026?

The maximum Part D deductible for 2026 is $615, up from $590 in 2025. However, not all plans charge the full deductible. Many plans offer lower deductibles or waive them entirely, especially for generic drugs. Always verify the deductible of any specific plan you are considering..

8. Can I change my Medicare plan more than once during open enrollment?

Yes. During the Annual Enrollment Period (October 15 – December 7), there is no limit on how many times you can change your plan selection. The only plan that matters is the last one you enroll in before the December 7 deadline, which will take effect on January 1.

9. What is the Medicare Advantage Open Enrollment Period (MA OEP)?

The Medicare Advantage Open Enrollment Period runs from January 1 to March 31 each year. It allows people who are already enrolled in a Medicare Advantage plan to either switch to a different Medicare Advantage plan or drop their plan and return to Original Medicare (with or without a Part D plan). You can only make one change during this period, and it is exclusively for existing Medicare Advantage enrollees.

10. How do I find the best Medicare plan for 2026?

Start by reviewing your Annual Notice of Change to see how your current plan is changing. Then list your doctors, specialists, hospitals, and all current medications. Use Medicare’s Plan Finder at Medicare.gov to compare options in your area. You can also speak with a licensed Medicare insurance agent through a marketplace like AHiX at no charge to get personalized recommendations based on your health needs and budget.

 Final Thoughts: Make the Most of Medicare Open Enrollment 2026

Medicare Open Enrollment is not just a bureaucratic exercise; it is a genuine opportunity to save money, improve your coverage, and make sure your healthcare plan matches where you are in life right now. With a 10% jump in Part B premiums, a new $2,100 drug cost cap, negotiated prescription drug prices, and shifting Medicare Advantage benefits, 2026 is a year that demands your attention.

The single most valuable thing you can do is review your Annual Notice of Change, verify that your doctors and medications are still covered, and compare alternatives before the deadline. Even five minutes of comparison shopping on Medicare’s Plan Finder or with a licensed broker could save you hundreds of dollars next year.

Need help navigating Medicare Open Enrollment 2026? AHiX Marketplace connects you with licensed insurance professionals who can walk you through your options completely free of charge. Visit ahix.com to compare plans and get personalized guidance today.