Medicare Open Enrollment Checklist 2026 — Step by Step Guide
Are you ready for Medicare Open Enrollment 2026? Having a Medicare Open Enrollment checklist is the single best way to make sure you review all the right things, compare the right plans, and make the best Medicare decisions before the December 7 deadline. Medicare Open Enrollment runs from October 15 to December 7 every year — and having a clear step-by-step checklist helps you avoid the most common mistakes seniors make during this critical enrollment window. In this complete guide we walk you through the complete Medicare Open Enrollment checklist for 2026 — every action you need to take, in the right order, with the right resources — so you can confidently review your Medicare coverage and make the best decisions for your health and budget. All information is sourced from Medicare.gov and CMS.gov.
Also Read —How Does Medicare Work for Seniors — Complete Guide 2026
What You Will Learn — Medicare Open Enrollment Checklist 2026
- The complete Medicare Open Enrollment checklist for 2026
- What to do before Medicare Open Enrollment starts October 15
- How to review your Annual Notice of Change
- How to compare Medicare Advantage plans during Open Enrollment
- How to compare Medicare Part D drug plans
- When to switch plans versus when to stay with your current plan
- How to enroll in a new Medicare plan
- What to do after Medicare Open Enrollment ends
- Frequently asked questions about the Medicare Open Enrollment checklist 2026
Why You Need a Medicare Open Enrollment Checklist
Medicare Open Enrollment is complex and the stakes are high. Making the wrong Medicare decision during Open Enrollment — or worse failing to review your coverage at all — can cost you thousands of dollars in the coming year. Here is why a Medicare Open Enrollment checklist is essential:
Plans change every year. Your current Medicare Advantage or Part D plan can increase premiums, reduce benefits, drop your doctors, or change your drug coverage on January 1. Without a checklist you might miss these critical changes.
There are dozens of plans to compare. In competitive Medicare markets like Florida, California, and Arizona seniors may have access to 30 or more Medicare Advantage plans. A checklist keeps you focused on the right criteria.
Deadlines are firm. The December 7 deadline for Medicare Open Enrollment does not move. Miss it and you are locked into your current plan for another year. A checklist ensures you take action before the deadline.
The Complete Medicare Open Enrollment Checklist 2026
PHASE 1 — BEFORE OPEN ENROLLMENT STARTS (September — October 14)
Checklist Item 1 — Gather Your Healthcare Records
Before Medicare Open Enrollment begins gather all of your current healthcare information in one place. You will need this information to compare plans accurately.
What to gather:
- ✅ List of all your current doctors — primary care physician, specialists, therapists
- ✅ List of all your current hospitals and surgery centers
- ✅ List of all your current prescription medications — drug name, dosage, quantity per month
- ✅ Your current Medicare card and plan information
- ✅ Your current Medicare Advantage or Part D plan card
- ✅ Any Explanation of Benefits (EOB) statements from your current plan
- ✅ Your Medicare Summary Notice if you have Original Medicare
Checklist Item 2 — Review Your Healthcare Usage from the Past Year
Think about how you used your healthcare in 2026 to predict what you will need in 2027:
- ✅ How many times did you see your primary care doctor?
- ✅ How many specialist visits did you have?
- ✅ Did you have any hospitalizations or surgeries?
- ✅ Did you use any outpatient services — physical therapy, lab tests, imaging?
- ✅ Did you have any dental, vision, or hearing care?
- ✅ Did you fill all your medications and were they all covered?
- ✅ Did you reach your annual out-of-pocket maximum?
- ✅ Did you use any extra benefits — OTC allowance, fitness, transportation?
Checklist Item 3 — Identify What Was Wrong with Your Current Plan
If you had any problems with your current Medicare plan in 2026 note them:
- ✅ Were your premiums too high?
- ✅ Were any of your doctors out of network?
- ✅ Were any of your medications not covered or too expensive?
- ✅ Did you have coverage or billing problems?
- ✅ Did you have prior authorization denials?
- ✅ Were there extra benefits you wanted but did not have — dental, vision, hearing?
Checklist Item 4 — Set Your Open Enrollment Budget
Determine what monthly premium you can afford and what out-of-pocket costs you are willing to accept:
- ✅ Maximum monthly premium you can budget
- ✅ Acceptable annual deductible
- ✅ Acceptable copays for doctor visits and specialist visits
- ✅ Acceptable annual out-of-pocket maximum
PHASE 2 — READ YOUR ANNUAL NOTICE OF CHANGE (When It Arrives Before October 15)
Checklist Item 5 — Read Your Annual Notice of Change Immediately
Your current Medicare Advantage or Part D plan must send you an Annual Notice of Change (ANOC) before October 15. This is the most important document you will receive about your Medicare coverage all year. Read it immediately when it arrives.
What to look for in your ANOC:
- ✅ Premium changes — is your monthly premium increasing?
- ✅ Deductible changes — is your annual deductible increasing?
- ✅ Out-of-pocket maximum changes — is your maximum increasing?
- ✅ Copay changes — are your doctor visit and specialist copays increasing?
- ✅ Drug formulary changes — are any of your medications being removed or moved to a higher cost tier?
- ✅ Network changes — are any of your doctors or hospitals leaving the network?
- ✅ Benefit changes — are dental, vision, hearing, OTC, or fitness benefits being reduced?
- ✅ Coverage area changes — is your plan leaving your service area?
Checklist Item 6 — Decide If Your Current Plan Is Still Right for You
After reading your ANOC decide whether your current plan still meets your needs:
- ✅ If your premium, benefits, doctors, and drugs are unchanged — your plan may still be the best option
- ✅ If premiums increased significantly — shop for alternatives
- ✅ If any of your doctors left the network — shop for alternatives
- ✅ If any of your drugs were removed or increased in cost — shop for alternatives
- ✅ If benefits were reduced — shop for alternatives
PHASE 3 — COMPARE PLANS (October 15 — November 30)
Checklist Item 7 — Go to Medicare Plan Finder
Go to Medicare.gov/plan-compare and enter your zip code. This is your primary tool for comparing all available Medicare plans in your area.
- ✅ Enter your zip code accurately — plan availability varies by county
- ✅ Select whether you want to compare Medicare Advantage or Part D plans
- ✅ Enter all your current prescription medications for accurate drug cost comparison
- ✅ Save your medication list in Medicare Plan Finder for easy future comparisons
Checklist Item 8 — Filter Plans by Star Rating
Filter Medicare Plan Finder results to show plans with 4 or 5 star ratings:
- ✅ Select 4-star and 5-star plans only
- ✅ Higher star ratings indicate better quality care and member satisfaction
- ✅ Plans with 5-star ratings qualify for the 5-Star Special Enrollment Period — enrollment available any time
Checklist Item 9 — Check Your Doctors Are In-Network
For each Medicare Advantage plan you are considering verify that your current doctors are in the plan’s network:
- ✅ Check your primary care physician
- ✅ Check all your current specialists
- ✅ Check your preferred hospital and surgery center
- ✅ Check any specialist you expect to see in 2027
- ✅ Use the plan’s online provider directory or call the plan directly
Checklist Item 10 — Compare Drug Coverage
For each Medicare Advantage or Part D plan compare how your medications are covered:
- ✅ Confirm all your medications are on the plan’s formulary
- ✅ Note what tier each medication is on — higher tiers cost more
- ✅ Check whether any medications require prior authorization or step therapy
- ✅ Compare total annual drug costs across plans — Medicare Plan Finder calculates this for you
- ✅ Check preferred pharmacy network — using preferred pharmacies saves money
Checklist Item 11 — Compare Total Annual Costs
Calculate your estimated total annual cost for each plan you are considering:
- ✅ Monthly premium multiplied by 12 = annual premium cost
- ✅ Estimate your annual deductible cost based on your typical healthcare usage
- ✅ Estimate your annual copay costs based on your typical visit frequency
- ✅ Estimate your annual drug costs based on your medication list
- ✅ Add all costs together for an estimated total annual cost
- ✅ Compare total annual cost — not just monthly premium — across all plans
Checklist Item 12 — Compare Extra Benefits
For Medicare Advantage plans compare the extra benefits each plan offers:
- ✅ Dental benefit — annual maximum, what is covered
- ✅ Vision benefit — exam coverage, eyeglass allowance
- ✅ Hearing benefit — exam coverage, hearing aid allowance
- ✅ OTC allowance — quarterly amount, what you can buy
- ✅ Fitness benefit — SilverSneakers, Renew Active, or gym memberships
- ✅ Transportation benefit — rides to medical appointments
- ✅ Telehealth — copay for virtual visits
- ✅ Part B premium reduction — does the plan offer a giveback benefit?
PHASE 4 — MAKE YOUR DECISION AND ENROLL (By December 7)
Checklist Item 13 — Narrow to Your Top Two or Three Plans
After comparing plans narrow your choices to the top two or three options:
- ✅ Best overall value — lowest total annual cost while meeting your healthcare needs
- ✅ Best network — includes all your current doctors and hospitals
- ✅ Best drug coverage — covers all your medications at the lowest cost
- ✅ Best extra benefits — dental, vision, hearing important to you
Checklist Item 14 — Contact the Plan or a Licensed Medicare Agent
Before enrolling confirm your selection with the plan or a licensed Medicare insurance agent:
- ✅ Call the plan directly and confirm your doctors are in-network
- ✅ Confirm your specific medications are on the current formulary
- ✅ Ask about any prior authorization requirements for your treatments
- ✅ Confirm the plan is accepting new members in your area
- ✅ A licensed Medicare agent can compare plans from multiple companies at no cost to you
Checklist Item 15 — Enroll in Your New Plan
Complete your Medicare plan enrollment before December 7:
- ✅ Online — enroll at Medicare.gov/plan-compare
- ✅ By phone — call Medicare at 1-800-633-4227
- ✅ Direct — call the plan you are enrolling in directly
- ✅ Through a licensed Medicare insurance agent
- ✅ Get a confirmation number and write it down
- ✅ Save or print your enrollment confirmation
Checklist Item 16 — Notify Your Doctors of Plan Change
After enrolling notify your doctors of your new Medicare plan:
- ✅ Call your primary care doctor’s office and notify them of your new plan
- ✅ Call all your specialists and notify them of your new plan
- ✅ Update your pharmacy with your new drug plan information
- ✅ Confirm your new plan is on file at your pharmacy before January 1
PHASE 5 — AFTER OPEN ENROLLMENT ENDS (After December 7)
Checklist Item 17 — Watch for Your New Plan Card
After enrolling watch for your new Medicare plan card to arrive:
- ✅ New Medicare Advantage or Part D plan cards should arrive by late December
- ✅ Keep your old plan card until December 31 in case you need healthcare before January 1
- ✅ Start using your new plan card beginning January 1, 2027
Checklist Item 18 — Review Your New Summary of Benefits
When your new plan materials arrive review the Summary of Benefits:
- ✅ Confirm your premium, deductible, and copays match what you expected
- ✅ Confirm your drug formulary includes all your medications
- ✅ Note any prior authorization requirements for your treatments
- ✅ Save your Summary of Benefits for reference throughout 2027
Checklist Item 19 — Set a Reminder for Open Enrollment 2027
Medicare Open Enrollment happens every year — set a reminder now:
- ✅ Set a calendar reminder for September 15, 2027 to start preparing
- ✅ Set a calendar reminder for October 15, 2027 when Open Enrollment begins
- ✅ Set a calendar reminder for December 1, 2027 to finalize your enrollment before the deadline
Medicare Open Enrollment Checklist — Quick Reference Summary
Here is the complete Medicare Open Enrollment checklist in quick reference format:
Before October 15:
- ✅ Gather healthcare records — doctors, medications, usage
- ✅ Review your 2026 healthcare usage
- ✅ Identify problems with your current plan
- ✅ Set your budget
When ANOC Arrives:
- ✅ Read Annual Notice of Change immediately
- ✅ Note all changes to your plan
- ✅ Decide whether to shop for alternatives
October 15 to December 7:
- ✅ Use Medicare.gov Plan Finder
- ✅ Filter by 4 and 5 star ratings
- ✅ Verify doctors in network
- ✅ Compare drug coverage
- ✅ Calculate total annual costs
- ✅ Compare extra benefits
- ✅ Narrow to top 2 to 3 plans
- ✅ Contact plan or agent to confirm
- ✅ Enroll before December 7
- ✅ Notify doctors of plan change
After December 7:
- ✅ Watch for new plan card
- ✅ Review Summary of Benefits
- ✅ Set reminder for 2027 Open Enrollment
Common Medicare Open Enrollment Mistakes to Avoid
Even with a checklist many Medicare beneficiaries make avoidable mistakes during Open Enrollment. Here are the most common mistakes and how to avoid them:
Mistake 1 — Only Looking at Monthly Premium The most common mistake is choosing a plan with the lowest monthly premium without calculating total annual costs. A plan with a $0 premium but high copays and drug costs may be much more expensive than a plan with a $50 monthly premium and lower cost-sharing. Always calculate total annual cost.
Mistake 2 — Not Checking Your Doctors Are In-Network Assuming your doctors will be in-network without verifying can result in paying out-of-network rates or losing access to your preferred doctors. Always verify doctor network status before enrolling.
Mistake 3 — Not Checking Your Drugs Are Covered Drug formularies change every year. A medication that was covered in 2026 may not be on your plan’s formulary in 2027 or may move to a more expensive tier. Always enter your medications into Medicare Plan Finder to verify coverage and cost.
Mistake 4 — Not Reading the Annual Notice of Change Many seniors toss the ANOC without reading it — missing important information about changes to their current plan. Always read your ANOC as soon as it arrives.
Mistake 5 — Waiting Until the Last Minute Waiting until December 6 or 7 to make enrollment changes creates unnecessary stress and risk. Make your decisions and enroll by November 30 to have time to resolve any issues before the deadline.
Mistake 6 — Not Getting Help Medicare plan comparison is complex. Free help is available from SHIP counselors, Medicare phone counselors, and licensed Medicare insurance agents. Do not struggle through the comparison process alone.
Frequently Asked Questions — Medicare Open Enrollment Checklist 2026
What is the most important thing to do during Medicare Open Enrollment 2026?
The most important thing to do during Medicare Open Enrollment 2026 is read your Annual Notice of Change immediately when it arrives before October 15. The ANOC tells you exactly what is changing about your current plan on January 1 — premium increases, benefit reductions, network changes, and drug formulary changes. If your plan is changing significantly Open Enrollment is your opportunity to switch to a better plan.
When should I start preparing for Medicare Open Enrollment 2026?
Start preparing for Medicare Open Enrollment 2026 in September before it officially begins on October 15. Gather your healthcare records, review your 2026 healthcare usage, and set your budget before Open Enrollment starts. This preparation makes the comparison process much faster and more focused when Open Enrollment begins.
Do I have to make changes during Medicare Open Enrollment?
No — you do not have to make changes during Medicare Open Enrollment. If your current plan has not changed significantly and you are satisfied with it you can do nothing and your current plan continues automatically into 2027. However you should always read your ANOC to confirm your plan has not changed in ways that could affect your coverage or costs.
How long does Medicare Open Enrollment take?
Most Medicare beneficiaries can complete a thorough plan review during Medicare Open Enrollment in 1 to 3 hours using Medicare.gov Plan Finder. More complex situations — multiple medications, frequent specialist visits, or significant healthcare needs — may take longer. Getting help from a SHIP counselor can make the process faster and ensure you consider all options.
Summary — Medicare Open Enrollment Checklist 2026
Medicare Open Enrollment 2026 runs from October 15 to December 7 — and having a complete checklist ensures you review all the right things and make the best Medicare decisions before the deadline. The most important steps are reading your Annual Notice of Change immediately when it arrives, using Medicare.gov Plan Finder to compare all available plans, verifying your doctors and medications are covered, and enrolling before December 7.
Free help is available throughout Medicare Open Enrollment 2026 from SHIP counselors at shiphelp.org or by calling Medicare free at 1-800-633-4227.
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
