What the fall window is for
Between October 15 and December 7, 2026, people already on Medicare can change how their Medicare is delivered for the coming year. That is the whole function of the window. Changes made inside it take effect with the new plan year rather than immediately, and the confirmation notice you receive is where the effective date is stated. The 2027 plans are on Medicare.gov’s Plan Finder from October 1, and the new star ratings appear around October 8, so the comparison can start before the window opens.
The season closes on December 7. That date sits before the state marketplace deadline of December 15 and well before the marketplace closing date of January 31, which is exactly why the two get confused every autumn in households where one person is on Medicare and another is not.
If you are happy with your plan, and you have checked next year’s costs, network and drug list against it, the correct action in this window is nothing. That is a legitimate outcome. It is only a bad outcome when “nothing” means “did not look.”
Two seasons in one autumn, kept apart
| Program | Window | What it changes |
|---|---|---|
| Medicare annual enrollment | Oct 15 to Dec 7, 2026 | Your Medicare Advantage plan, your drug plan, and whether you use Original Medicare or an Advantage plan |
| NY State of Health marketplace | Nov 1, 2026 to Jan 31, 2027 | Marketplace plans for people not on Medicare. Dec 15 for a January 1 start |
| Medicaid, Essential Plan, Child Health Plus | Year-round | Nothing seasonal. Applications accepted any month |
The practical consequence in a mixed household: two calendars, two applications, two sets of paperwork, and no overlap between the people who administer them. A marketplace navigator is not the right person for a Medicare Advantage question, and the reverse is equally true. The full calendar keeps every date from October to April in one place.
The four parts, in the order they matter to a decision
Medicare is built in parts, and the parts are the vocabulary every phone call will use.
Part A is hospital insurance: inpatient hospital care and related institutional services.
Part B is medical insurance: doctor visits, outpatient care, and the services that happen outside an admission.
Part C, usually called Medicare Advantage, is the alternative delivery route. A private plan provides your Part A and Part B benefits, generally through a defined network, and often bundles drug coverage with them.
Part D is prescription drug coverage, sold as a standalone plan or built into an Advantage plan.
The decision most people are actually making in the fall is between two structures: Original Medicare with a separate drug plan, or a Medicare Advantage plan that bundles. Networks, referral rules and drug lists differ between them, and that difference is what shows up in your life. We do not publish premium figures or cost-sharing amounts for any of these, because those numbers change annually per plan, and a stale figure in an article is worse than no figure.
What the window changes, and what it does not touch
| You want to | Is the fall window the right tool? |
|---|---|
| Switch from one Medicare Advantage plan to another | Yes |
| Move from Original Medicare to Medicare Advantage, or back | Yes |
| Join, drop or switch a Part D drug plan | Yes |
| Sign up for Medicare for the very first time | No. First enrollment runs on your own dates, not the fall calendar |
| Buy or change a Medicare supplement policy | Not needed. In New York an insurer must sell you a supplement in any month, whatever your health. What that changes |
| Apply for Medicaid alongside Medicare | No. That application is year-round, through the local department of social services if you are 65 or older |
The two “no” rows are where people lose money. First-time enrollment timing depends on your birthday and on whether you or a spouse are still working with employer coverage, so we deliberately print no dates for it here. Get those dates from Medicare directly and write them down, because missing them has lasting cost consequences that a later phone call cannot undo.
After December 7: the windows that stay open
The fall window closes, but three narrower doors stay open into 2027.
| Window | Dates | Who it is for | What it allows |
|---|---|---|---|
| Medicare Advantage open enrollment | January 1 to March 31, 2027 | People already in an Advantage plan | One change: another Advantage plan, or back to Original Medicare with a stand-alone drug plan. Joining the drug plan ends the Advantage plan automatically |
| General enrollment | January 1 to March 31 | People who missed their first enrollment and have no special period | Sign up for Part B, and Part A if you must buy it. Coverage starts the first day of the next month; a late penalty may apply |
| Five-star special enrollment | December 8, 2026 to November 30, 2027 | Anyone, if a plan rated 5 stars exists in your area | One switch into that plan |
The January window cannot be used to move from Original Medicare into an Advantage plan. Someone who joined an Advantage plan when they first got Medicare has a window of their own: within the first three months of Part A and Part B, they can change plans or go back to Original Medicare. The January window in detail · Missed Part B? · If your plan is leaving
The envelope that decides whether you should do anything
Every fall, your plan sends a notice of what changes next year. It is the least interesting piece of mail you will receive all season and the only one that matters. Open it with three questions in hand.
Did my costs change? Premiums and cost sharing are set annually by each plan.
Did my doctors stay in network? Practices join and leave plans between years, and no one sends a separate letter about your specific doctor. Call the practice, give the exact plan name, and ask whether they participate for the coming year.
Did my prescriptions move? Drug lists are rewritten annually. A medication can shift to a tier that costs several times what it did, or leave the list entirely. Read the formulary with your actual medication names and doses in front of you.
The notice has to arrive by September 30. How to read it, line by line.
Sentence for the plan’s member services line: “I’m reviewing my plan for next year. Please confirm whether my prescriptions are still covered at the same tier, and whether my primary care doctor is still in network for the 2027 plan year.”
What is already known about 2027
Some figures are set for everyone rather than per plan. Those we print.
- Part D out-of-pocket cap: $2,400 for covered drugs in 2027, up from $2,100 in 2026. Once you reach it, covered drugs cost nothing for the rest of the year. The largest deductible a standard drug plan may charge rises to $700.
- Part B premium: not announced for 2027 when we checked. The 2026 standard premium is $202.90 a month, with a $283 deductible.
- The Medicare Prescription Payment Plan, which spreads drug costs across the year without lowering them, continues. It renews by itself if you stay in the same drug plan and ends if you switch, so a new plan means opting in again.
- Advantage plan allowance cards are limited to the plan year and to items the plan covers. Unused money does not carry over.
- Some non-citizens lose Medicare on January 4, 2027. Federal law now limits Medicare to citizens, green card holders, Cuban and Haitian entrants and citizens of the Compact of Free Association nations; for the other groups the Medicare Savings Program already ended on October 1, 2026. What changes and what New York keeps.
- Prior authorization in Advantage plans: a decision within 72 hours for an urgent request and 7 days for a standard one, with a specific reason for any denial. From January 1, 2027, plans must also accept requests electronically.
Dual eligible: Medicare plus Medicaid
Some people qualify for both programs. Medicare comes with age 65 or with disability. Medicaid is income based, and it is the program that covers long-term care, which Medicare does not.
Holding both is not a paperwork error, and it is worth pursuing if your income is low. It comes with additional help, and the correct move is to ask what specifically applies to you rather than to assume.
Two procedural facts that save wasted calls. For people 65 and older, and for applications based on disability, Medicaid runs through the local department of social services, not through NY State of Health, and it applies asset tests that the working-age categories do not. And Medicaid takes applications year-round, so the December 7 Medicare deadline has nothing to do with it.
Opening line that routes the call correctly: “I have Medicare and I want to apply for Medicaid. I’m over 65, so should this go through the local department of social services?”
How Medicaid works in New York, including the renewal problem that causes most coverage losses.
Where to get help without buying anything
Two kinds of help exist in this season, and they are not the same.
Free counseling that sells nothing. HIICAP, New York’s Health Insurance Information, Counseling and Assistance Program, gives free, objective Medicare counseling through a program in every county; 1-800-701-0501 routes you to yours. The Medicare Rights Center, a nonprofit based in New York City, runs a national helpline at 800-333-4114. Certified navigators at NY State of Health, 1-855-355-5777, are free and commission-free, though their remit is the state marketplace and the year-round programs rather than Medicare plan selection.
Sales contacts. Mailers that look official, television advertisements with a phone number, and unsolicited calls are marketing. Some of the people behind them are competent brokers. All of them are paid when you enroll.
You are allowed to ask, and asking is not rude: “Before we go further, are you an insurance agent or a counselor? Are you paid a commission if I enroll in a plan through you?”
What this page will not tell you
Three deliberate gaps, and the reason for each.
No plan premiums or plan cost sharing. Those are set per plan, per year, and a stale number sends people into the wrong plan. The few federal figures that apply to everyone are in the 2027 section above.
No plan rankings or “best plan” lists. The best plan is the one your doctors take and your prescriptions sit on, and that answer is different for every household on your floor.
No first-enrollment dates. They depend on your birthday and your working situation, and getting them from a general article rather than from your own record is how people acquire permanent cost consequences.
What this page can do is tell you which season you are in, which questions produce real answers, and which envelope to open.
Advantage or Original: the decision itself
The window above is where you can switch between the two structures. The comparison that matters, networks, approvals, the cap on your costs, and the New York rule that lets you buy a supplement at any time regardless of health, is on its own page: Medicare Advantage vs Original Medicare in New York.
Questions people ask
I turn 65 next spring. Is this fall window mine?
No. First-time enrollment runs on dates tied to your own eligibility, not the October to December window, which is for changing coverage you already have. Get your specific dates from Medicare and note them, especially if you or your spouse are still working with employer coverage.
I have Medicare. Do I need to do anything on NY State of Health?
Not for your Medicare. The marketplace season is a separate program on a separate calendar. The exception is Medicaid: if your income is low, dual eligibility is worth pursuing, and for people 65 and older that application goes through the local department of social services.
What happens if I do nothing before December 7?
Your current plan continues into the new year with next year’s terms. That is fine if you checked those terms and acceptable to you. It is expensive if your drug list changed and you find out at the pharmacy in January.
Can I keep my doctor if I switch plans?
Only if that doctor participates in the plan you are moving to. Call the practice, give the exact plan name and the carrier, and ask about the coming plan year specifically. A carrier can offer several plans with different networks.
What changes on January 1, 2027?
Your plan’s new premiums, network and drug list take effect, the Part D out-of-pocket cap rises to $2,400, and the January-to-March windows open. The 2027 Part B premium had not been announced when we checked.
Who can compare plans with me without selling anything?
HIICAP, New York’s free Medicare counseling program, at 1-800-701-0501, or the Medicare Rights Center’s helpline at 800-333-4114.
I lost employer coverage at 66. What now?
That is a coverage loss, and it has its own timing rules that are separate from the fall season. Do not wait for October. What to do in the first week after losing coverage covers the sequence, and the Medicare-specific timing question goes to Medicare directly.
In this section
Medicare Advantage vs Original Medicare in New York: The Decision, Not the Ads
What actually differs between Original Medicare with a supplement and a Medicare Advantage plan: networks, referrals, the cap on your costs, drug coverage, and the New York rule that lets you buy a supplement at any time.
Medicare Savings Programs in New York: Who Pays Your Part B Premium
New York's Medicare Savings Programs pay your Part B premium and, at lower incomes, Medicare cost sharing. The 2026 monthly limits, no asset test, where to apply.
Having Medicare and Medicaid Together in New York
Dual eligibility is not a paperwork error: Medicaid covers premiums, cost sharing and the long-term care Medicare never pays for. How to get the second one.
Sources
- NYS Department of Health — GIS 26 MA/14, non-citizen coverage and the Medicare Savings Program (September 29, 2026) (checked 2026-09-30)
- Medicare.gov — when coverage starts (checked 2026-08-12)
- NY State of Health (checked 2026-08-12)
- Medicare & You 2027 — the official handbook (checked 2026-09-29)
- CMS — 2027 Rate Announcement (Part D out-of-pocket cap) (checked 2026-09-29)
- NYS Office for the Aging — HIICAP, free Medicare counseling (checked 2026-09-29)
- New York State Department of Health — Medicaid (checked 2026-08-12)
More in Medicare in New York: What the Fall Season Actually Decides
- Having Medicare and Medicaid Together in New York — Dual eligibility is not a paperwork error: Medicaid covers premiums, cost sharing and the long-term care Medicare never pays for. How to get the second one.
- Medicare Advantage vs Original Medicare in New York: The Decision, Not the Ads — What actually differs between Original Medicare with a supplement and a Medicare Advantage plan: networks, referrals, the cap on your costs, drug coverage, and the New York rule that lets you buy a supplement at any time.
- Medicare Savings Programs in New York: Who Pays Your Part B Premium — New York's Medicare Savings Programs pay your Part B premium and, at lower incomes, Medicare cost sharing. The 2026 monthly limits, no asset test, where to apply.
This page explains how the system works. It is not medical advice. More.