If you have Medicare, early fall is the right time to review your coverage during Medicare Open Enrollment. Your plan may look familiar, but its costs, covered medications, provider network, or benefits may change for the coming year.
Your Annual Notice of Change, often called an ANOC, should arrive by September 30. Medicare Open Enrollment then runs from October 15 through December 7 each year. Changes made during this period generally take effect on January 1 of the following year.
That gives you time to read your notice, compare options, and ask questions before making a decision.
This article explains what to review, where to get unbiased help, and how Medicare decisions can fit into your broader family planning.
What Medicare Open Enrollment means
Medicare Open Enrollment is the annual period when many people with Medicare can change how they receive health and prescription drug coverage.
During Medicare Open Enrollment, you may generally:
- Switch from Original Medicare to a Medicare Advantage plan.
- Switch from Medicare Advantage to Original Medicare.
- Change from one Medicare Advantage plan to another.
- Join, drop, or change a stand-alone Part D prescription drug plan if you have Original Medicare.
- Join a Medicare Advantage plan that includes drug coverage, if you have Original Medicare and a stand-alone Part D plan.
The official Medicare Open Enrollment page explains the options available based on your current coverage.
The deadline is important. Medicare.gov states that the plan must receive your enrollment request by December 7 for the change to take effect January 1.
Start with your Annual Notice of Change
Your ANOC explains how your Medicare Advantage or Part D plan will change for the next plan year. It is usually sent by September 30.
Do not assume that staying with your current plan means everything stays the same. Plans can change their premiums, cost-sharing, covered medications, provider networks, and other terms from year to year.
When you receive your ANOC, look for changes in these areas:
1. Premiums and deductibles
Review the monthly premium. Then look beyond the premium.
Check:
- Annual medical deductibles.
- Prescription drug deductibles.
- Copays for primary care and specialists.
- Coinsurance for hospital care, testing, and other services.
- Maximum out-of-pocket limits for Medicare Advantage plans.
- Costs for specific tiers of prescription drugs.
A plan with a lower monthly premium may not have the lowest total annual cost for your particular health needs.
2. Prescription drug coverage
Review each medication you take. Confirm:
- Whether the drug remains covered.
- Which formulary tier applies.
- Whether you need prior authorization.
- Whether step therapy applies.
- Whether quantity limits have changed.
- Whether your preferred pharmacy remains in network.
- Whether mail-order options are available.
Use your current medication list when comparing plans. Include brand names, generic names, dosage, and how often you take each medication.
3. Doctors, hospitals, and specialists
Your plan’s provider network can change. Confirm that your important providers remain in network for the coming year.
Check your:
- Primary care doctor.
- Specialists.
- Preferred hospital.
- Imaging and laboratory providers.
- Rehabilitation providers.
- Behavioral health providers.
Do not rely only on a provider’s website or an old insurance card. Confirm network participation through the plan and the Medicare Plan Finder.
4. Pharmacy networks
Your preferred pharmacy may no longer have the same pricing arrangement with your plan. Compare local and mail-order pharmacy options.
This matters especially if you regularly use a pharmacy near your New York home and another pharmacy in Florida.
Why review your plan if you are happy with it?
You may have had a good experience with your plan. That is valuable information, but it is not the only factor to consider.
A plan may change because of:
- New premiums or deductibles.
- Changes in insurer contracts.
- A revised drug formulary.
- Provider or hospital network changes.
- New prior authorization requirements.
- Adjustments to supplemental benefits.
- Changes in service areas.
- Changes in how costs are divided between you and the plan.
A plan that worked well this year may still be a reasonable choice next year. The point of Medicare Open Enrollment is to check rather than assume.

Understand how Medicare Advantage, Medigap, and Part D work together
Medicare coverage choices can feel complicated because the terms are often used together. The basic structure is important.
Medicare Advantage
Medicare Advantage, also called Medicare Part C, is offered by private insurance companies approved by Medicare. These plans generally provide Part A and Part B coverage through the plan. Many also include prescription drug coverage.
Medicare Advantage plans commonly use provider networks. That means you should pay close attention to where you receive routine care.
Original Medicare with Medigap
Original Medicare includes Part A and Part B. You may also purchase a Medicare Supplement Insurance policy, commonly called Medigap, from a private insurer.
Medigap may help pay some costs that Original Medicare does not pay in full. It does not function as a replacement for Medicare Part A or Part B.
Medigap policies generally do not include prescription drug coverage. If you use Original Medicare with Medigap and want prescription drug coverage, you may need a separate Part D plan.
Part D prescription drug coverage
Part D provides prescription drug coverage through a stand-alone plan or, in many cases, as part of a Medicare Advantage plan.
If you move from Medicare Advantage to Original Medicare, you may need to choose a separate Part D plan. You should also review your Medigap eligibility and timing before making that change. Medigap rules can depend on your circumstances, health history, state law, and available enrollment rights.
Do not assume that moving from one type of Medicare coverage to another automatically gives you the same options for Medigap.
Medicare Open Enrollment is different from other enrollment periods
Several Medicare periods sound similar but serve different purposes.
Medicare Advantage Open Enrollment Period
The Medicare Advantage Open Enrollment Period runs from January 1 through March 31.
It is generally available only to people who are already enrolled in a Medicare Advantage plan. It can generally be used only once during that January 1 through March 31 window. During this period, you may generally:
- Switch to another Medicare Advantage plan.
- Leave Medicare Advantage and return to Original Medicare.
- Join a stand-alone Part D plan if you return to Original Medicare.
This period is not a substitute for reviewing your options during October 15 through December 7.
Special Enrollment Periods
Special Enrollment Periods may be available after certain life events. Examples can include:
- Moving outside your plan’s service area.
- Losing employer or union coverage.
- Moving into or out of certain institutions.
- Having a plan end its contract with Medicare.
- Qualifying for certain assistance programs.
The rules and deadlines depend on the event. If you believe you qualify for a Special Enrollment Period, review the requirements through Medicare.gov or speak with a qualified counselor.
Medicare is not the ACA Marketplace
Medicare Open Enrollment is also different from open enrollment through the Affordable Care Act Marketplace.
The Marketplace does not provide Medicare Supplement Insurance or Medicare prescription drug plans. Medicare and Marketplace coverage have different rules, costs, enrollment periods, and coordination requirements.
HealthCare.gov explains how Medicare and the Marketplace interact. If you are approaching Medicare eligibility or changing from Marketplace coverage, check the transition carefully. Do not cancel one form of coverage until you understand when the other begins and what penalties may apply.
A practical Medicare Open Enrollment checklist
Use this checklist before December 7:
- Find your ANOC. Look for it in the mail or your online plan account.
- Compare this year with next year. Mark changes in premiums, deductibles, copays, formularies, and networks.
- List your medications. Include dosage, frequency, and preferred pharmacies.
- Confirm your providers. Check doctors, hospitals, specialists, laboratories, and other regular providers.
- Use Medicare Plan Finder. The official Medicare Plan Finder allows you to compare health and drug plans using your ZIP code, medications, and pharmacies.
- Compare total estimated costs. Consider premiums, deductibles, copays, coinsurance, and expected care.
- Ask for unbiased assistance. The State Health Insurance Assistance Program, or SHIP, provides local, one-on-one Medicare counseling. SHIP counselors can help you understand your ANOC and compare plans.
- Confirm the deadline. Give yourself enough time to submit an enrollment request by December 7.
- Save your records. Keep your ANOC, comparison notes, confirmation numbers, and new plan materials.
- Review your broader planning. Consider whether a coverage change affects your doctors, caregivers, health care agent, or emergency contacts.
Hypothetical example: Maria spends most of the year in Clearwater and part of the summer in Erie County. Her Medicare Advantage plan remains available in both areas, but several of her preferred Florida providers are no longer in network. Before changing plans, Maria compares her providers in both states and speaks with a SHIP counselor. She also tells her family and health care agent about her new plan and preferred doctors.
Snowbirds should check both states
If you split your time between New York and Florida, your plan may work differently in each location.
Review:
- Whether your plan operates in both service areas.
- Whether routine care is covered outside your primary service area.
- How emergency and urgent care are handled.
- Whether your doctors in Clearwater, St. Petersburg, Dunedin, Largo, Safety Harbor, Bradenton, or Erie County are in network.
- Whether your prescriptions can be filled at pharmacies in both states.
- Whether your address and residence information are current with Medicare and your plan.
Plan availability depends on your eligibility, enrollment status, county, and other facts. A plan available in Buffalo may not be available in Pinellas or Manatee County. A Florida plan may not provide the same routine network access in New York.
Your Medicare review can also be a useful prompt to review your broader snowbird and dual-resident estate planning.
Connect Medicare decisions with incapacity planning
Changing a health plan does not automatically update your estate planning documents. Your health care agent, financial agent, HIPAA authorizations, and health care instructions may still need review.
Confirm that your trusted decision-makers know:
- Which Medicare plan you have.
- Which doctors you see.
- Which medications you take.
- Where you spend time during the year.
- Who may speak with your providers.
- Where to find your insurance and legal documents.
Our Powers of Attorney and Healthcare Directives page explains how incapacity planning can help your family act with greater clarity if you cannot make or communicate decisions yourself.
At Life & Legacy Planning vs. traditional wills, our Life & Legacy Planning® approach looks beyond one document or one decision. We help families review changing circumstances, family dynamics, assets, and health care wishes as part of a coordinated plan.
Review now, decide carefully
Medicare Open Enrollment does not require you to change plans. It gives you a defined opportunity to review your coverage before the next plan year.
Start with your ANOC. Compare your medications, providers, pharmacies, and total expected costs. Use Medicare Plan Finder. Contact SHIP for unbiased counseling. If you are a snowbird, check both New York and Florida.
If your Medicare review raises questions about health care agents, powers of attorney, or your broader family plan, contact Santopolo Law, PLLC. We can help you identify the planning questions that deserve attention.
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General information disclaimer: This article provides general information only. It is not legal advice, Medicare advice, insurance advice, or financial advice. Medicare rules, health plan terms, laws, policies, and enrollment rights vary based on your circumstances and may change. Review current information through Medicare.gov, Social Security, your plan, or a qualified counselor. Reading this article does not create an attorney-client relationship.