Medicare Open Enrollment 2027: Dates, Premium Changes and a 5-Step Checklist
Medicare Open Enrollment for 2027 coverage runs from October 15 through December 7, 2026. Here is what beneficiaries should know about Part D costs, projected Medicare Advantage premiums, the still-unconfirmed Part B premium and the five checks to make before choosing a plan.
Editorial illustration representing Medicare Open Enrollment 2027 dates, premium changes and checklist
Table of Contents (18 sections)
Medicare Open Enrollment for coverage in 2027 runs from October 15 through December 7, 2026, giving people already enrolled in Medicare an annual opportunity to review and change their health or prescription drug coverage.
The dates themselves are familiar. What deserves closer attention this year is the mix of confirmed and projected cost changes behind the plans.
The maximum Medicare Part D deductible rises to $700 in 2027, while the annual Part D out-of-pocket threshold rises to $2,400. At the same time, the Centers for Medicare & Medicaid Services, or CMS, is projecting lower average Medicare Advantage premiums nationally.
Another widely discussed number — a $209.50 standard monthly Medicare Part B premium — is different. That amount is still an estimate from the 2026 Medicare Trustees Report, not the final 2027 Part B premium announced by CMS.
That distinction matters for anyone trying to build a retirement or health-care budget.
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Open Enrollment is therefore not simply a deadline to remember. It is an opportunity to check whether the plan that worked in 2026 will still make financial and practical sense in 2027.
Key Takeaways
Open Enrollment: Oct 15 – Dec 7, 2026 (coverage starts Jan 1, 2027).
Part D max deductible: $700 | Out-of-pocket threshold: $2,400.
Medicare Advantage average premiums projected to fall.
Part B premium $209.50 is still a Trustees estimate, not final.
Review Annual Notice of Change, prescriptions, doctors and total costs.
Medicare Open Enrollment 2027 dates
The annual Medicare Open Enrollment Period runs:
October 15, 2026 — Open Enrollment begins
December 7, 2026 — Deadline for most Open Enrollment changes
January 1, 2027 — Coverage selected during the period generally takes effect
This annual period is primarily for people who already have Medicare and want to review or change how they receive their coverage.
During Open Enrollment, depending on their current coverage, beneficiaries may be able to switch from one Medicare Advantage plan to another, move between Original Medicare and Medicare Advantage, or join, drop or change Medicare prescription drug coverage.
It should not be confused with the Initial Enrollment Period for someone first becoming eligible for Medicare or with the separate Medicare Advantage Open Enrollment Period that operates early in the calendar year.
Why reviewing coverage matters even if you like your current plan
One of the easiest mistakes during Medicare Open Enrollment is assuming that doing nothing means nothing changes.
A plan may keep the same name while changing important details for the next year.
Premiums can change.
Deductibles can change.
Copayments or coinsurance can change.
Prescription drug formularies can change.
A drug may move to a different pricing tier.
Pharmacy arrangements can change.
Doctor, hospital or provider networks in Medicare Advantage plans can change.
Extra benefits may also be revised.
That is why beneficiaries should read the Annual Notice of Change sent by their existing plan each fall rather than relying on what the plan covered during 2026.
Automatic renewal can be convenient, but convenience should not replace an annual review.
What changes for Medicare in 2027?
Several important national figures are already available, while others remain projections.
Medicare item
2026
2027
Status
Maximum Part D deductible
$615
$700
Confirmed
Part D out-of-pocket threshold
$2,100
$2,400
Confirmed
Weighted-average Medicare Advantage premium
$14.37 monthly
$12.00 monthly
CMS projection
Average stand-alone Part D premium
$35.09 monthly
About $36 monthly
CMS projection
Average Part D premium within MA plans with drug coverage
$11.32 monthly
About $7 monthly
CMS projection
Standard Part B monthly premium
$202.90
$209.50
Trustees projection; not yet final
Part B annual deductible
$283
$292
Trustees projection; not yet final
The status column is important.
The 2027 Part D deductible and out-of-pocket threshold have been finalized. Medicare Advantage and Part D average premium figures are CMS projections based on the 2027 plan landscape.
The $209.50 Part B premium and $292 Part B deductible, however, come from Medicare Trustees estimates. They should not be reported as final CMS rates unless and until CMS officially announces the 2027 amounts.
Part D deductible rises to as much as $700
For 2027, no Medicare drug plan may impose a deductible above $700, up from $615 in 2026.
That does not mean every beneficiary will automatically pay a $700 deductible.
Individual plans can set a lower deductible, and some may have no deductible for some or all covered drugs. What matters is the design of the specific plan available in a beneficiary's location.
For someone comparing Part D coverage, the deductible is therefore only one number to examine.
A plan with a low premium could have a higher deductible or less favorable cost sharing for a person's medications. Another plan could charge a higher premium but produce lower overall prescription costs because of its formulary, pharmacy network or drug tiers.
The practical comparison is total expected annual cost, not premium alone.
Part D out-of-pocket threshold rises to $2,400
The Part D annual out-of-pocket threshold for covered drugs increases from $2,100 in 2026 to $2,400 in 2027.
This is another reason for beneficiaries with expensive prescriptions to run their current medications through Medicare's 2027 Plan Finder rather than assuming last year's plan remains the cheapest choice.
The out-of-pocket threshold applies within the Part D benefit structure and to spending that counts toward the threshold. It should not be interpreted as a guarantee that every health-care or medication-related expense a person faces during the year can never exceed $2,400.
Costs for drugs not covered by the plan, as well as health-care expenses outside Part D, can follow different rules.
Stand-alone Part D premiums are projected to remain relatively stable nationally
CMS projects that the average monthly premium for stand-alone Part D prescription drug plans will rise by less than $1 nationally, from $35.09 in 2026 to about $36 in 2027.
An average, however, is not a quote for an individual beneficiary.
Part D availability and pricing are regional, and premiums can vary significantly between plans. The drugs someone takes, the pharmacy they use and the plan's formulary may have a larger effect on yearly spending than a small difference in monthly premium.
CMS has also set the 2027 national Part D base beneficiary premium at $41.33. That figure is used in the program's premium calculations and should not be confused with the amount every Part D enrollee will actually pay.
Plan-specific premiums remain the figure consumers should compare.
Medicare Advantage average premiums are projected to fall
CMS projects the weighted-average monthly premium across Medicare Advantage plans to decline from $14.37 in 2026 to $12.00 in 2027, a decrease of about 16.5 percent.
For Medicare Advantage plans that include prescription drug coverage, CMS projects the average Part D portion of the monthly premium to fall from $11.32 to about $7.
Those national averages may sound encouraging, but they do not mean every beneficiary's plan will become cheaper.
Medicare Advantage is highly local.
Available plans, premiums, provider networks, out-of-pocket maximums and supplemental benefits depend on where a beneficiary lives.
CMS says more than 99 percent of Medicare beneficiaries nationally are expected to have access to at least one Medicare Advantage plan for 2027 and 97 percent are expected to have access to 10 or more choices.
Having more choices can be useful, but it also makes careful comparison more important.
A $0 Medicare Advantage premium does not mean $0 health-care cost
Premium is only one component of Medicare Advantage cost.
Many Medicare Advantage plans advertise a $0 additional monthly plan premium. Beneficiaries generally must still pay the applicable Medicare Part B premium, and the plan can have deductibles, copayments, coinsurance and other cost-sharing requirements.
Provider networks can also have a major practical impact.
Someone who sees a specialist regularly may value network access more than a small premium difference. A person taking several prescription medications may find that the drug formulary and preferred pharmacies matter more than an advertised supplemental benefit.
This is why there is no single universally "best Medicare plan."
The best fit depends on a person's doctors, prescriptions, pharmacies, expected care, travel patterns, budget and preference for how coverage is structured.
Is the 2027 Medicare Part B premium really $209.50?
Not yet.
The confirmed standard Medicare Part B premium for 2026 is $202.90 per month.
The 2026 Medicare Trustees Report estimates that the standard monthly premium could be $209.50 in 2027, an increase of $6.60 per month, or about 3.25 percent.
The same Trustees report estimates a $292 annual Part B deductible for 2027, compared with $283 in 2026.
But these are projections.
The Trustees explicitly describe future-year figures as estimates that can differ from the final amounts as actual program experience develops.
Until CMS announces the official 2027 Part B premium and deductible, beneficiaries should treat $209.50 and $292 as planning estimates rather than finalized bills.
This distinction is especially important because Medicare coverage decisions may be made during Open Enrollment before every national Medicare cost figure for the following year is finalized.
Your five-step Medicare Open Enrollment checklist
Step 1: Read your Annual Notice of Change
Start with the document from your existing Medicare Advantage or prescription drug plan.
Compare its 2027 terms with what you had in 2026.
Look specifically for changes to:
Premium
Deductible
Copayments and coinsurance
Drug coverage
Drug tiers
Provider network rules
Pharmacy arrangements
Prior-authorization requirements where applicable
Supplemental benefits
Do not assume that familiar branding means familiar coverage.
Step 2: Re-enter your prescriptions rather than comparing premiums alone
For anyone who uses prescription medications regularly, this may be the most important step.
Use the 2027 Medicare Plan Finder and check the exact medications you take.
Confirm whether each drug is covered, which tier it falls into, whether restrictions apply and how the estimated cost changes at different pharmacies.
A plan that looks inexpensive based only on the monthly premium can become much more expensive once prescription costs are included.
Conversely, a somewhat higher-premium plan may sometimes produce lower total annual spending for a particular medication list.
Step 3: Check every important doctor, specialist and hospital
People considering Medicare Advantage should verify whether the health-care providers they rely on participate in the plan's 2027 network.
Do not rely solely on assumptions based on the current year.
Provider participation can change.
If a particular physician, specialist, hospital or treatment center is essential to your care, check its status directly with both the plan and provider when possible before enrolling.
People comparing Original Medicare with Medicare Advantage should also consider how much provider flexibility matters to them.
Step 4: Compare total yearly cost, not the headline premium
The cheapest-looking premium is not automatically the cheapest coverage.
A useful comparison should consider:
Monthly premiums
Deductibles
Expected doctor and specialist copays
Hospital cost sharing
Prescription costs
Maximum out-of-pocket exposure in Medicare Advantage
Expected dental, vision or hearing expenses if supplemental benefits matter to you
Whether your preferred pharmacy receives favorable pricing
The right question is not simply, "Which plan has the lowest premium?"
It is, "Which option gives me the best combination of access, coverage and expected total cost for the care I am likely to use?"
Step 5: Use Medicare Plan Finder and review quality information before the December 7 deadline
Medicare.gov's Plan Finder is displaying 2027 plan options.
CMS also released the 2027 Medicare Advantage and Part D Star Ratings, which appear in Plan Finder and can provide another measure for comparing plan quality.
Star Ratings should not be the only factor in a decision, but they can be considered alongside price, benefits, drug coverage and provider access.
Beneficiaries who want assistance can also seek help through Medicare's official support channels or their State Health Insurance Assistance Program.
The key is to compare before the December 7 deadline rather than discovering an unwanted plan change after the new year begins.
Do not let your Medicare plan renew on autopilot
Automatic renewal is useful when a beneficiary has reviewed the new terms and decided that the current plan remains appropriate.
The problem is automatic renewal without review.
Consider a beneficiary whose monthly premium barely changes but whose most-used drug moves to a less favorable tier.
Another person's premium may fall while a preferred specialist leaves the network.
A third person's current plan may still work well, making no change the correct decision.
The point of Open Enrollment is not that everybody should switch.
It is that everybody affected should check.
If the existing coverage still provides the right doctors, medications, benefits and overall cost, remaining in the plan can be a perfectly reasonable choice.
Be especially careful when moving between Medicare Advantage and Original Medicare
Open Enrollment allows eligible beneficiaries to switch from Medicare Advantage back to Original Medicare or move from Original Medicare into Medicare Advantage.
Those decisions involve more than comparing premiums.
Someone returning to Original Medicare may need separate Part D prescription coverage and may also want Medicare Supplement Insurance, commonly called Medigap, to help with certain out-of-pocket costs.
Medicare warns that there are limits on when Medigap coverage can be added.
For that reason, a beneficiary considering a major coverage change should investigate the implications before dropping an existing plan rather than assuming every supplemental option will automatically remain available afterward.
What does "best Medicare plan" actually mean?
Searches for the "best Medicare plans for 2027" typically increase around Open Enrollment, but there is no national plan that is objectively best for every beneficiary.
Medicare Advantage and Part D plans vary geographically.
Individual needs vary even more.
A useful plan for one person may be a poor fit for a spouse, neighbor or relative living in the same ZIP code.
A beneficiary who takes no regular prescriptions may prioritize different features from someone using multiple high-cost medications.
A frequent traveler may value different network arrangements from someone who receives nearly all care close to home.
Someone managing a chronic condition may put specialist access and predictable cost sharing ahead of extra benefits.
A responsible comparison therefore begins with the beneficiary's own health-care needs rather than a national ranking.
What has already been finalized and what remains uncertain?
Going into the 2027 enrollment period, beneficiaries can rely on several confirmed facts.
Open Enrollment runs from October 15 through December 7, 2026.
The maximum Part D deductible is $700 in 2027.
The Part D out-of-pocket threshold is $2,400.
The 2027 Medicare Advantage and Part D plan landscape is available for comparison, and CMS has published the 2027 Star Ratings.
What should not yet be treated as final is the $209.50 standard Part B premium.
That is the Medicare Trustees' current estimate.
Keeping confirmed numbers separate from projections is important because retirement health-care decisions can involve thousands of dollars over a year.
What happens next
The immediate next step for beneficiaries is to review their 2027 options during the October 15-December 7 enrollment window.
Those satisfied with their current plan should still read the Annual Notice of Change and check their doctors and medications.
Those considering a switch should compare plan-specific costs and coverage through Medicare's official Plan Finder before enrolling.
CMS is also expected to separately establish final Medicare Part B costs for 2027. When the official figure is published, it should replace the current Trustees estimate in household budget calculations and in any coverage comparisons affected by Part B costs.
Bottom Line
Medicare Open Enrollment for 2027 is not simply a search for the lowest premium.
The Part D maximum deductible rises to $700 and the annual out-of-pocket threshold to $2,400. Medicare Advantage premiums are projected to decline on average nationally, while stand-alone Part D premiums are projected to remain relatively stable.
The standard Part B premium is currently estimated at $209.50 for 2027, but that figure is not yet final.
For beneficiaries, the most useful approach is straightforward: read the Annual Notice of Change, enter current prescriptions into Medicare Plan Finder, verify doctors and hospitals, compare estimated total costs and complete any change by December 7.
Renewing the same plan may ultimately be the right decision.
It should simply be an informed one.
Key Takeaway
Medicare Open Enrollment: Oct 15–Dec 7, 2026.
Part D deductible up to $700; OOP threshold $2,400. MA premiums projected lower. Part B $209.50 still estimate.
Review plan changes, drugs, doctors and total costs before deadline.
The Rajatheertha Team publishes news, explainers, guides and updates across India and the world. Our coverage follows Rajatheertha's editorial, verification and corrections standards.
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