Medicare renews automatically, but you must act during the enrollment window to make changes

Your Medicare coverage continues into the next calendar year without you having to reapply. However, this automatic renewal does not mean your coverage stays exactly the same. If you want to switch plans, add or drop coverage, or change your prescription drug plan, you must make those changes during the annual enrollment period — otherwise your current plan renews as-is on January 1.

The automatic renewal process is straightforward: Medicare sends you a notice in the fall, your current plan continues unless you act, and your new coverage year begins January 1. The catch is timing. If you miss the enrollment window, you are locked into your current plan for the entire year, with limited exceptions for life changes like moving, losing employer coverage, or getting married.

Key Takeaways

  • Your Medicare coverage automatically renews each January 1 with your current plan, so you do not have to reapply to keep coverage.
  • The annual enrollment period runs October 15 through December 7 each year, and this is your only chance to switch plans or change coverage without a may have access to life event.
  • Medicare sends you a notice before the enrollment period showing your current plan, its costs for the coming year, and your options to change.
  • If you miss the December 7 important date, your plan renews automatically and you cannot switch until the next October, with rare exceptions for major life changes.
  • You must act during enrollment even if you are happy with your plan, because premiums, deductibles, and covered drugs change every year.

How automatic renewal works

On January 1 of each year, your Medicare coverage continues with the same plan you had the previous year. You do not fill out forms or contact Medicare to keep your coverage active. Your premiums are deducted from your Social Security check (or billed directly if you do not receive Social Security), and your coverage begins when ready.

This automatic process applies to all types of Medicare: Original Medicare (Parts A and B), Medicare Advantage plans, and prescription drug plans (Part D). If you are in a Medicare Advantage plan, that plan renews. If you have Original Medicare with a Medigap supplemental policy, both renew. The renewal is silent — you do not receive a confirmation that it happened, but it does.

The automatic renewal protects you from losing coverage by accident. You are never without Medicare because you forgot to renew. However, automatic renewal also means that if your plan changes its costs or coverage in ways you do not like, you are stuck with those changes unless you act during the enrollment period.

The annual enrollment period and your window to make changes

Every year from October 15 through December 7, you can change your Medicare plans. This is called the annual enrollment period, and it is the only time most people can switch plans without a special reason. During this window, you can move from one Medicare Advantage plan to another, switch from Medicare Advantage back to Original Medicare, add or drop a prescription drug plan, or change your Medigap policy.

Medicare sends you a notice called the "Annual Notice of Change" in September or early October. This notice tells you what your current plan will cost next year, which drugs are covered, and which doctors are in the network. It also lists other plans available in your area. You can review this notice, compare plans online at Medicare.gov, or call 1-800-MEDICARE to discuss your options.

The December 7 important date is firm. If you submit a plan change request by December 7, your new plan takes effect January 1. If you miss this date, your current plan renews automatically and you cannot switch until the next October, except in specific situations like moving to a new state, losing employer coverage, or experiencing a death in your family.

What happens if you do nothing during enrollment

If you take no action between October 15 and December 7, your current plan renews on January 1 with no interruption. Your coverage continues, your premiums stay the same (unless your plan raised them, which you would have seen in the Annual Notice of Change), and you keep the same doctors and pharmacies — assuming they remain in your plan's network.

Doing nothing is a valid choice if you are satisfied with your plan and its costs. Many people renew their plans year after year without changes. However, you should still review your Annual Notice of Change each fall, because plans often adjust their premiums, deductibles, copays, and covered medications. A plan you liked last year might cost significantly more or cover fewer of your drugs this year.

If you realize after January 1 that you made a mistake or your plan no longer works for you, your options are limited. You cannot switch plans until the next October 15, unless you experience a may have access to life event. The main exceptions are moving to a new state (which may give you a 60-day window to change plans), losing employer coverage, or changes in your family status.

Life events that let you change plans outside the enrollment period

If certain events happen during the year, you may be able to change your Medicare plan outside the October-December window. These are called may have access to life events, and they include moving to a new state or county, losing employer coverage, getting married or divorced, becoming a U.S. citizen, or the death of a spouse or family member.

When a may have access to event occurs, you usually have 60 days to make a plan change. For example, if you move to a new state in March, you have until early May to switch to a plan that works in your new location. You must contact Medicare or your plan directly to report the event and request the change. straightforward calling 1-800-MEDICARE and explaining your situation is the fastest way to start the process.

Not all life changes may have access to. Losing your job does not automatically may have access to you unless you also lose health coverage through that job. A change in your income does not may have access to. Your plan dropping out of your area does may have access to — if your current plan stops serving your county, Medicare automatically sends you a notice and gives you a window to switch.

Changes to your plan's costs and coverage each year

Even if your plan renews automatically, the plan itself may change. Every year, Medicare Advantage plans and prescription drug plans adjust their premiums, deductibles, copayments, and the list of covered medications. Original Medicare Part B premiums also change annually. These changes take effect January 1, so your renewed coverage may cost more or cover less than it did the previous year.

Your Annual Notice of Change spells out these adjustments. It shows your new premium, any changes to your deductible or copay amounts, and which drugs are covered. If your most-used medications are no longer on the formulary (the plan's list of covered drugs), or if they moved to a higher cost tier, this is critical information for deciding whether to stay with your plan or switch.

This is why reviewing your notice in the fall matters, even if you plan to renew. A plan that was affordable last year might become expensive this year. A drug you take regularly might no longer be covered. If either happens, the October-December enrollment period is your chance to move to a plan that works better for your situation in the coming year.

How to review your coverage before the enrollment period ends

Start by reading your Annual Notice of Change when it arrives in September or October. This document lists your plan's new costs and any coverage changes. Next, go to Medicare.gov and use the "Find Care Providers" tool to check whether your doctors and hospitals are still in your plan's network for next year. Networks change, and a doctor you see regularly might be out-of-network starting January 1.

If you take prescription medications, use the "Find Prescription Drug Plans" tool on Medicare.gov to see which plans cover your drugs and at what cost tier. Enter your medications and compare the total out-of-pocket cost across plans. A plan with a lower premium might have higher copays for your specific drugs, so comparing total cost matters more than comparing premiums alone.

If you need help comparing plans, call 1-800-MEDICARE to speak with a counselor, or contact your State Health Insurance information Program (SHIP). SHIP counselors are free and can walk you through your options over the phone. You can find your state's SHIP by searching "SHIP" plus your state name online, or by asking when you call 1-800-MEDICARE.

Frequently Asked Questions

What if I want to keep my current plan — do I have to do anything?

No. Your plan renews automatically on January 1. You do not need to contact Medicare, your plan, or anyone else. Your coverage continues and your premiums are deducted as usual. However, you should still review your Annual Notice of Change to understand any cost or coverage changes for the coming year.

Can I change my plan after December 7?

Not unless you experience a may have access to life event like moving to a new state, losing employer coverage, or a death in your family. If you miss the December 7 important date without a may have access to event, your current plan renews and you are locked in until October 15 of the next year. Plan ahead and make changes during the enrollment period.

If my plan raises its premium, can I switch plans?

Yes, a premium increase is not a may have access to life event, but you can switch during the annual enrollment period from October 15 through December 7. This is the time to compare other plans in your area and move to one with lower costs if you find a better option. After December 7, you cannot switch unless a may have access to event occurs.

What if my doctor leaves my plan's network after I renew?

If your doctor leaves the network after your plan renews on January 1, contact your plan when ready to ask about your options. Some plans allow you to continue seeing an out-of-network doctor at in-network rates for a limited time. If your plan does not accommodate this, you may be able to request a plan change outside the enrollment period, though this varies by situation.

Do I have to renew my Medigap policy too?

Medigap policies renew automatically just like Medicare plans. Your supplemental coverage continues on January 1 unless you cancel it or switch to a different Medigap plan. You can change Medigap plans during the annual enrollment period, though some insurers may require underwriting if you switch outside your initial enrollment window.