Medicare Open Enrollment 2026

Medicare Open Enrollment 2026 is the most important time of year for every Medicare beneficiary in the United States. Medicare Open Enrollment — officially called the Annual Election Period or Annual Enrollment Period — runs from October 15 to December 7 every year and gives every Medicare beneficiary the opportunity to review, change, or update their Medicare coverage for the upcoming year. Whether you are happy with your current plan or looking to switch this complete guide explains everything you need to know about Medicare Open Enrollment 2026 — what it is, what changes you can make, how to compare plans, key deadlines, and exactly how to make the most of this critical enrollment window. All information is sourced from Medicare.gov and CMS.gov.

Also Read —Medicare Advantage vs Medigap — Which is Better in 2026?

Table of Contents

What You Will Learn — Medicare Open Enrollment 2026

What is Medicare Open Enrollment 2026
When is Medicare Open Enrollment 2026 — exact dates
What changes can you make during Medicare Open Enrollment
Why Medicare Open Enrollment is the most important time of year
How to compare Medicare plans during Open Enrollment
What happens if you miss Medicare Open Enrollment
The Medicare Advantage Open Enrollment Period January through March
Step by step guide to reviewing your Medicare coverage
Frequently asked questions about Medicare Open Enrollment 2026

What Is Medicare Open Enrollment 2026?

Medicare Open Enrollment 2026 — officially called the Annual Election Period (AEP) — is the annual window during which every Medicare beneficiary can make changes to their Medicare coverage. During Medicare Open Enrollment you can switch between Original Medicare and Medicare Advantage, change your Medicare Advantage plan, add or change your Medicare Part D prescription drug plan, or drop a Part D plan.

Medicare Open Enrollment is the single most important time of year for Medicare beneficiaries because it is your primary opportunity to review your current Medicare coverage and make sure you have the best plan for your health needs and budget in the upcoming year. Medicare plans can change significantly from year to year — premiums, benefits, formularies, and provider networks can all change on January 1. Medicare Open Enrollment is your chance to catch these changes and switch to a better plan if needed.

The best Medicare plans during Open Enrollment 2026 may be different from the best plans in 2025. Insurance companies change their Medicare Advantage plans and Part D drug plans every year. A plan that was perfect for you last year may have increased its premiums, reduced its benefits, dropped your doctors from its network, or changed its drug formulary. Reviewing your coverage during Medicare Open Enrollment 2026 is essential to making sure you still have the best plan for your situation.

When Is Medicare Open Enrollment 2026 — Exact Dates

Medicare Open Enrollment 2026 runs from:

October 15, 2026 to December 7, 2026

This is the Annual Election Period — the main Medicare Open Enrollment window that applies to all Medicare beneficiaries.

All changes made during Medicare Open Enrollment 2026 take effect on January 1, 2027.

These dates are the same every year — October 15 to December 7. Mark your calendar now and set a reminder for October 1 to start reviewing your Medicare coverage before Open Enrollment officially begins.

medicare open enrollment 2026 timeline key dates october 15 december 7

Why Medicare Open Enrollment Is the Most Important Time of Year

Medicare Open Enrollment is the most important time of year for Medicare beneficiaries for several critical reasons.

Plans Change Every Year

Medicare Advantage plans and Part D drug plans can change significantly on January 1 every year. Changes that take effect each January 1 can include:

Premium increases — your monthly plan premium may increase significantly Benefit reductions — dental, vision, hearing, or OTC benefits may be reduced Network changes — your doctors or hospitals may leave the plan’s network Formulary changes — your prescription drugs may be removed from coverage or moved to a higher cost tier Deductible increases — plan deductibles may increase Prior authorization requirements — new requirements may be added for your medications or procedures

If you do not review your Medicare coverage during Open Enrollment you may be surprised on January 1 when your plan has changed significantly — your premium is higher, your drugs cost more, or your doctor is no longer in network.

You Receive an Annual Notice of Change

Every year before October 15 your Medicare Advantage or Part D plan must send you an Annual Notice of Change (ANOC) — a document that details every change to your plan for the upcoming year. Read this notice carefully — it tells you exactly what will change about your coverage on January 1.

If your ANOC shows significant increases in premiums, reductions in benefits, or removal of your doctors or drugs from coverage Medicare Open Enrollment is your opportunity to switch to a better plan.

CPC Rates Spike During Open Enrollment

For MedicareBuddyy.com readers — Medicare Open Enrollment is also the time when advertiser spending on Medicare content reaches its peak. Insurance companies spend billions of dollars on Medicare advertising during Open Enrollment driving Medicare-related CPC rates to 3 to 5 times their normal levels. Your articles about Medicare Open Enrollment will earn significantly more during October 15 to December 7 than at any other time of year.

What Changes Can You Make During Medicare Open Enrollment 2026?

During Medicare Open Enrollment 2026 — October 15 to December 7 — you can make the following changes to your Medicare coverage:

Switch from Original Medicare to Medicare Advantage

If you currently have Original Medicare Parts A and B you can enroll in a Medicare Advantage plan during Open Enrollment. Your Medicare Advantage coverage begins January 1, 2027.

Switch from Medicare Advantage to Original Medicare

If you currently have a Medicare Advantage plan you can switch back to Original Medicare during Open Enrollment. Important note — if you switch back to Original Medicare and want to add a Medigap supplement you may face medical underwriting in most states unless you live in New York, Massachusetts, or Connecticut which have year-round Medigap guaranteed issue.

Switch from One Medicare Advantage Plan to Another

If you currently have a Medicare Advantage plan you can switch to a different Medicare Advantage plan — from a different company or a different plan from the same company — during Open Enrollment.

Add a Medicare Part D Drug Plan

If you currently have Original Medicare without a Part D drug plan you can add a Part D plan during Open Enrollment. Coverage begins January 1.

Switch from One Part D Plan to Another

If you currently have a Part D drug plan you can switch to a different Part D plan during Open Enrollment — for example to one with better coverage for your specific medications or lower premiums.

Drop a Part D Drug Plan

You can drop your Part D drug plan during Open Enrollment and return to Original Medicare without drug coverage. Note — dropping Part D without other qualifying drug coverage may result in a late enrollment penalty if you want to rejoin later.

what you can change during medicare open enrollment 2026 can and cannot

What You CANNOT Change During Medicare Open Enrollment 2026

It is equally important to know what you cannot change during Medicare Open Enrollment:

You cannot add Medigap during Medicare Open Enrollment

Medicare Open Enrollment does not include an enrollment window for Medigap supplement plans. If you want to add or switch a Medigap plan you must use your Medigap Open Enrollment Period — the 6-month window starting when you first enroll in Medicare Part B at age 65 — or one of the specific Medigap Special Enrollment Periods. Exceptions apply in New York, Massachusetts, and Connecticut.

You cannot change Medicare Supplement plans through Open Enrollment

Medigap is separate from Medicare Advantage and Part D. Open Enrollment does not affect Medigap plans.

How to Compare Medicare Plans During Open Enrollment 2026

Making the most of Medicare Open Enrollment 2026 requires a systematic approach to comparing plans. Here is the step by step process:

Step 1 — Read Your Annual Notice of Change (ANOC)

Your current Medicare Advantage or Part D plan must send you an ANOC before October 15. Read it carefully to understand what is changing about your current plan on January 1. Pay particular attention to:

Premium changes
Deductible changes
Changes to your specific drug coverage
Network changes — are your doctors still in network?
Changes to dental, vision, and hearing benefits

Step 2 — Make a List of Your Healthcare Priorities

Before comparing plans write down:

Your current doctors and specialists — you want to confirm they are in network
Your current prescription medications — you want to confirm drug coverage and costs
Your healthcare facilities — hospitals and surgery centers you use
Your budget for monthly premiums and out-of-pocket costs
Any extra benefits that are important to you — dental, vision, fitness

Step 3 — Use Medicare Plan Finder

Go to Medicare.gov/plan-compare and enter your zip code. The Medicare Plan Finder shows all Medicare Advantage and Part D plans available in your area with:

Monthly premiums
Annual deductibles
Out-of-pocket maximums
Star ratings
Drug coverage costs for your specific medications
Provider network information

Step 4 — Filter by Star Rating

Filter plan results to show plans with 4 or 5 star ratings. Higher star ratings indicate better quality care, member satisfaction, and customer service.

Step 5 — Check Your Doctors and Drugs

Use the plan’s provider directory to confirm your current doctors are in-network. Enter your specific medications to see exactly what each plan charges for your drugs.

Step 6 — Calculate Total Annual Costs

Do not focus only on monthly premiums. Calculate your estimated total annual cost including premiums, deductibles, copays for your typical healthcare usage, and drug costs. A plan with a higher premium may be less expensive overall if it has lower copays or better drug coverage for your medications.

Step 7 — Contact the Plan or a Licensed Agent

Before enrolling call the plan directly to confirm your doctors are in network and your drugs are on the formulary. A licensed Medicare insurance agent can also help you compare plans at no cost to you.

Step 8 — Enroll Before December 7

Complete your enrollment before the December 7 deadline. You can enroll online at Medicare.gov, by calling Medicare at 1-800-633-4227, or by contacting the plan directly.

how to compare medicare plans during open enrollment 2026 step by step guide

What Happens If You Miss Medicare Open Enrollment 2026?

If you miss Medicare Open Enrollment 2026 — meaning you do not make any changes before December 7, 2026 — your current Medicare coverage automatically continues into 2027. You are not required to take any action during Open Enrollment if you are satisfied with your current plan.

However if you want to make changes after December 7 your options are limited:

Medicare Advantage Open Enrollment Period — January 1 to March 31

If you miss the annual Open Enrollment you have a second chance to make limited changes during the Medicare Advantage Open Enrollment Period from January 1 to March 31. During this period you can:

Switch from one Medicare Advantage plan to a different Medicare Advantage plan
Switch from Medicare Advantage back to Original Medicare and add a Part D plan

You cannot switch from Original Medicare to Medicare Advantage during the January through March period.

Special Enrollment Periods

Certain qualifying life events allow you to make Medicare changes outside of Open Enrollment — these are called Special Enrollment Periods (SEPs). Qualifying events include:

Moving out of your plan’s service area
Losing employer coverage
Qualifying for Medicaid
Your plan losing Medicare certification

If none of these apply you must wait until the next Annual Open Enrollment Period.

Medicare Open Enrollment 2026 Timeline

Here is the complete Medicare Open Enrollment 2026 timeline:

Before October 1 — Review your healthcare usage from the past year. Make a list of your doctors, medications, and healthcare needs.

By October 1 — Your Medicare Advantage and Part D plans must send your Annual Notice of Change. Read it carefully as soon as it arrives.

October 1 to October 14 — Preview new Medicare plans for 2027 on Medicare.gov before Open Enrollment officially begins. Plans are available to view but not yet available for enrollment.

October 15 — Medicare Open Enrollment begins. You can now enroll in or switch Medicare Advantage and Part D plans.

October 15 to December 7 — Compare plans, check your doctors and drugs, and make enrollment changes if needed.

December 7 — Medicare Open Enrollment ends. This is the absolute deadline for making plan changes effective January 1, 2027.

January 1, 2027 — All plan changes made during Open Enrollment take effect.

Free Help During Medicare Open Enrollment 2026

You do not need to navigate Medicare Open Enrollment alone. Here are free resources available to help:

Medicare Plan Finder — Medicare.gov/plan-compare — free online tool to compare all plans in your area

SHIP Counselors — Free one-on-one Medicare counseling available in every state through trained volunteer counselors. Find your state SHIP at shiphelp.org

Medicare Helpline — Call Medicare free at 1-800-633-4227 — available 24 hours 7 days a week

Licensed Medicare Insurance Agents — Independent Medicare insurance agents can compare plans from multiple companies at no cost to you. Agents are paid by insurance companies not by you.

Frequently Asked Questions — Medicare Open Enrollment 2026

When is Medicare Open Enrollment 2026?

Medicare Open Enrollment 2026 runs from October 15, 2026 to December 7, 2026. This is the Annual Election Period during which all Medicare beneficiaries can make changes to their Medicare Advantage and Part D drug plans. All changes made during Open Enrollment take effect January 1, 2027.

What can I change during Medicare Open Enrollment 2026?

During Medicare Open Enrollment 2026 you can switch from Original Medicare to Medicare Advantage, switch from Medicare Advantage to Original Medicare, switch between Medicare Advantage plans, add or change a Part D drug plan, or drop a Part D drug plan. You cannot add or change a Medigap supplement plan during Open Enrollment.

Do I have to do anything during Medicare Open Enrollment?

No — if you are satisfied with your current Medicare coverage you do not need to take any action during Open Enrollment. Your current plan continues automatically. However you should still review your Annual Notice of Change to check for premium increases, benefit reductions, or network and formulary changes that could affect your coverage.

What is the Medicare Open Enrollment deadline for 2026?

The Medicare Open Enrollment deadline for 2026 is December 7, 2026. All plan changes must be submitted before midnight on December 7 to take effect January 1, 2027. Do not wait until the last minute — submit your changes well before the deadline.

Can I switch from Medicare Advantage to Original Medicare during Open Enrollment?

Yes — you can switch from Medicare Advantage to Original Medicare during the Annual Open Enrollment Period October 15 to December 7. If you want to add a Medigap supplement after switching back to Original Medicare you may face medical underwriting in most states. If you live in New York, Massachusetts, or Connecticut you can add Medigap without underwriting at any time due to year-round guaranteed issue.

What is the Annual Notice of Change?

The Annual Notice of Change — also called the ANOC — is a document your Medicare Advantage or Part D plan must send you before October 15 each year. The ANOC details every change to your plan for the upcoming year including premium increases, benefit changes, drug formulary changes, and network changes. Read your ANOC carefully before Medicare Open Enrollment begins.

What happens if I miss Medicare Open Enrollment 2026?

If you miss the December 7 deadline your current Medicare coverage continues into 2027. You can make limited changes during the Medicare Advantage Open Enrollment Period January 1 to March 31 — specifically switching between Medicare Advantage plans or switching from Medicare Advantage to Original Medicare. You cannot switch from Original Medicare to Medicare Advantage during this period.

Summary — Medicare Open Enrollment 2026

Medicare Open Enrollment 2026 runs from October 15 to December 7, 2026 — the most important Medicare planning window of the year. During this period every Medicare beneficiary can review their current coverage, compare new options, and make changes that take effect January 1, 2027.

The key actions to take during Medicare Open Enrollment 2026:

Read your Annual Notice of Change when it arrives before October 15
Use Medicare Plan Finder at Medicare.gov to compare all plans in your area
Verify your doctors are still in network and your drugs are still covered
Calculate your estimated total annual cost — not just monthly premiums
Make any desired changes before the December 7 deadline
Get free help from your state SHIP counselor or by calling Medicare at 1-800-633-4227

Do not let Medicare Open Enrollment pass without reviewing your coverage. Plans change every year and the best Medicare plan for 2026 may not be the best plan for 2027.

This guide is for informational purposes only and is not medical or financial advice. Always verify current Medicare plan details at Medicare.gov before making enrollment decisions.

Sources: Medicare.gov | CMS.gov | SSA.gov | AARP.org

Last updated: April 2026 | Author: James Carter, Independent Medicare Research Analyst

Medicare Open Enrollment 2026 — Complete Guide