If you are wondering when is medicare open enrollment for 2027, the annual Medicare Open Enrollment Period begins October 15, 2026, and ends December 7, 2026. This is the main opportunity for people already enrolled in Medicare to review their health and prescription drug coverage and make changes for the upcoming 2027 plan year. Any coverage selected during this period generally takes effect January 1, 2027.
The fall enrollment period is an important time for Medicare beneficiaries because plan premiums, provider networks, prescription coverage, deductibles and additional benefits can change from one year to another. A plan that was affordable and convenient in 2026 may not necessarily offer the same value in 2027.
Medicare Open Enrollment Dates for 2027
The Medicare Annual Election Period, commonly known as Medicare Open Enrollment, follows the same general schedule each year.
For the 2027 plan year, the key dates are:
- October 15, 2026: Medicare Open Enrollment begins.
- December 7, 2026: Medicare Open Enrollment ends.
- January 1, 2027: Coverage selected during the fall enrollment period generally begins.
- January 1 through March 31, 2027: Medicare Advantage Open Enrollment Period.
The October 15 deadline is the starting point for comparing 2027 coverage. December 7 is the important deadline for most beneficiaries who want to make a change during the annual enrollment period.
Because the enrollment period occurs before the year of coverage, it is easy to confuse the 2026 enrollment dates with the 2027 coverage year. Beneficiaries are making their decisions in late 2026 for healthcare coverage that will generally apply throughout 2027.
What Is Medicare Open Enrollment?
Medicare Open Enrollment is the annual period when people who already have Medicare can review their existing coverage and make certain changes for the following year.
The enrollment period primarily concerns Medicare Advantage plans and Medicare prescription drug coverage. Beneficiaries can compare available plans based on premiums, deductibles, prescription costs, healthcare providers, pharmacies and other benefits.
Depending on their circumstances, people may be able to:
- Change from one Medicare Advantage plan to another.
- Move from Medicare Advantage to Original Medicare.
- Move from Original Medicare to Medicare Advantage.
- Join a Medicare Part D prescription drug plan.
- Switch from one Part D plan to another.
- Drop certain Medicare coverage.
- Review whether their current prescription coverage remains appropriate.
The choices available to each person depend on their existing Medicare coverage and individual circumstances.
Why 2027 Medicare Open Enrollment Matters
Medicare beneficiaries should not assume that their current plan will remain unchanged.
Insurance companies can modify plan premiums, deductibles, copayments, covered services, provider networks and prescription drug formularies for a new plan year. Even when a plan keeps a similar monthly premium, other costs or benefits may change.
For example, a prescription that was inexpensive in 2026 could have a different cost in 2027. A preferred pharmacy could change. A doctor could leave a Medicare Advantage network. A plan could also change its supplemental benefits.
These changes make the fall review particularly important for people who regularly use medical services or take several prescription medications.
Review Your Annual Notice of Change
Medicare Advantage and Part D beneficiaries generally receive an Annual Notice of Change, or ANOC, before the new plan year.
This document provides information about changes that will affect the plan beginning in January. Beneficiaries should read it carefully rather than putting it aside with other insurance paperwork.
Pay close attention to:
- Monthly premiums
- Annual deductibles
- Doctor visit costs
- Specialist copayments
- Hospital costs
- Prescription drug costs
- Drug formularies
- Pharmacy networks
- Provider networks
- Maximum out-of-pocket limits
- Dental benefits
- Vision benefits
- Hearing benefits
- Other supplemental services
The ANOC can help determine whether staying with the current plan makes sense.
Medicare Advantage Options for 2027
Medicare Advantage continues to provide beneficiaries with an alternative way to receive Medicare-covered healthcare through private Medicare-approved plans.
For 2027, national Medicare Advantage availability remains broad, although the number of plans and benefits differs depending on where a person lives.
The projected weighted average monthly premium for Medicare Advantage plans is $12 in 2027, down from a projected $14.37 in 2026.
However, a national average does not tell an individual beneficiary what their actual premium will be. Medicare Advantage costs vary by plan, county and coverage details.
Some plans may have low or even $0 monthly premiums, but beneficiaries should look beyond the premium when comparing options. Copayments, deductibles, provider networks, prescription expenses and maximum out-of-pocket limits can have a major impact on total healthcare spending.
Medicare Part D in 2027
Prescription drug coverage deserves special attention during the annual enrollment period.
For 2027, the projected average monthly premium for stand-alone Medicare Part D plans is approximately $36. Individual plan premiums can be higher or lower depending on the plan and where the beneficiary lives.
The standard Part D benefit will also have important cost-sharing parameters for 2027.
The standard Part D deductible is scheduled to be $700 in 2027, compared with $615 in 2026. The out-of-pocket threshold is scheduled to increase to $2,400 in 2027, compared with $2,100 in 2026.
These figures do not mean every beneficiary will pay those exact amounts. Actual prescription costs depend on the selected plan, medications, pharmacy and other factors.
Why Prescription Drug Lists Matter
One of the most important steps during enrollment is checking whether all of your regular medications remain covered.
Every Part D plan has a formulary, which is the list of prescription drugs the plan covers. Plans can organize medications into different tiers, with different copayments or coinsurance amounts.
Before choosing a plan for 2027, beneficiaries should make a complete list of their medications and compare that list with each plan under consideration.
It is also useful to check whether the plan requires:
- Prior authorization
- Step therapy
- Quantity limits
- A specific pharmacy
- Mail-order fulfillment
A plan with a slightly higher monthly premium could potentially provide lower overall prescription expenses for someone taking several medications.
How to Compare Medicare Plans
Choosing Medicare coverage should involve more than comparing monthly premiums.
Consider Your Doctors
If you are considering Medicare Advantage, check whether your primary care physician, specialists and preferred hospitals participate in the plan’s network.
A low-cost plan may become inconvenient if your preferred providers are not included.
Review Your Prescription Costs
Make a list of the medications you expect to take throughout 2027. Compare coverage, copayments, coinsurance, formularies and participating pharmacies.
Calculate Potential Annual Costs
Look at the bigger financial picture. Monthly premiums are only one part of Medicare expenses.
Consider:
- Premiums
- Deductibles
- Copayments
- Coinsurance
- Prescription costs
- Specialist expenses
- Hospital expenses
- Maximum out-of-pocket limits
This approach can provide a more realistic picture of what a plan could cost over an entire year.
Check Extra Benefits
Some Medicare Advantage plans provide additional benefits beyond Original Medicare, such as dental, vision and hearing coverage.
These benefits can vary considerably among plans. Beneficiaries should check exactly what is covered, what limitations apply and whether particular providers are required.
Can You Change Medicare Plans After December 7?
The December 7 deadline is extremely important, but it is not the only enrollment opportunity available under Medicare.
Certain beneficiaries may qualify for a Special Enrollment Period because of specific life circumstances. Examples can include changes involving employment coverage, relocation or loss of qualifying insurance.
Eligibility rules vary, so beneficiaries should not assume they qualify for a Special Enrollment Period without checking the applicable requirements.
There is also a separate Medicare Advantage Open Enrollment Period.
Medicare Advantage Open Enrollment Period 2027
The Medicare Advantage Open Enrollment Period runs from January 1 through March 31, 2027.
This enrollment period is available to people who are already enrolled in Medicare Advantage.
During this period, eligible beneficiaries can generally make one change to another Medicare Advantage plan or return to Original Medicare, with the option of obtaining prescription drug coverage where appropriate.
The Medicare Advantage Open Enrollment Period is different from the fall annual enrollment period.
The fall period is when beneficiaries make coverage decisions for the upcoming year, while the January-through-March period provides an additional opportunity for people already enrolled in Medicare Advantage to reconsider their coverage.
Do New Medicare Beneficiaries Use Open Enrollment?
People who are newly eligible for Medicare generally have a separate Initial Enrollment Period.
For someone approaching age 65, the Initial Enrollment Period is particularly important because it is based on the person’s Medicare eligibility date and has different rules from the annual fall enrollment period.
A person who is becoming eligible for Medicare should not automatically wait until October to enroll. Depending on their circumstances, delaying enrollment could result in coverage issues or potential late enrollment penalties.
The appropriate enrollment period depends on factors such as age, disability status and other qualifying coverage.
Medicare Open Enrollment Is Different From Marketplace Enrollment
Medicare Open Enrollment should not be confused with the Affordable Care Act Marketplace’s annual enrollment period.
Medicare and Marketplace insurance are separate programs with different eligibility and enrollment rules.
People who already have Medicare generally should not treat the Marketplace as a replacement for their Medicare coverage. Anyone considering changes involving both programs should understand how their existing coverage will be affected before making a decision.
What to Do Before October 15
Preparing early can make Medicare enrollment much easier.
Before the annual enrollment period begins, beneficiaries can gather their insurance documents, medication information and healthcare provider details.
A useful preparation checklist includes:
- Review your current plan.
- Read your Annual Notice of Change.
- Make a list of all prescription medications.
- Check your doctors and specialists.
- Review your preferred hospitals.
- Compare pharmacy options.
- Look at expected 2027 healthcare expenses.
- Compare available Medicare Advantage plans.
- Compare Part D prescription drug plans.
- Check whether you qualify for financial assistance programs.
Starting early can help prevent a rushed decision as the December 7 deadline approaches.
When Is Medicare Open Enrollment for 2027 and What Is the Deadline?
For beneficiaries planning ahead, the central dates are October 15, 2026, through December 7, 2026. The December 7 deadline is especially important because most people who want to change their Medicare Advantage or Part D coverage for 2027 should complete their enrollment during this period.
The new coverage generally begins January 1, 2027.
Anyone who waits until after the deadline should determine whether another enrollment opportunity applies to their situation rather than assuming they can make the same change immediately.
Key Medicare Dates for 2027
| Date | Medicare event |
|---|---|
| October 15, 2026 | Annual Medicare Open Enrollment begins |
| December 7, 2026 | Annual Medicare Open Enrollment ends |
| January 1, 2027 | New coverage generally begins |
| January 1, 2027 | Medicare Advantage Open Enrollment begins |
| March 31, 2027 | Medicare Advantage Open Enrollment ends |
These dates provide a useful starting point, but individual Medicare enrollment rights can vary based on personal circumstances.
Final Takeaway
Medicare beneficiaries should treat the fall enrollment period as an opportunity to reassess their healthcare coverage rather than simply renewing the same plan automatically.
For 2027, changes to premiums, prescription drug costs, deductibles, provider networks and supplemental benefits could affect how much a beneficiary spends and which healthcare services are available throughout the year.
The best plan is not necessarily the one with the lowest monthly premium. The right choice depends on healthcare needs, medications, preferred providers, expected medical expenses and the benefits that matter most to the individual.
With the annual enrollment period running from October 15 through December 7, 2026, beneficiaries have a defined window to evaluate their choices before 2027 coverage begins.
Have you reviewed your Medicare options for 2027 yet? Share your questions or experience in the comments and stay informed about the latest Medicare updates.