Medicare Open Enrollment 2026: Dates, Plan Changes and What Seniors Need to Know
Medicare Open Enrollment begins October 15, 2026, giving millions of Americans an opportunity to review their health insurance and prescription drug coverage for 2027. The annual enrollment period runs through December 7, and any changes made during this period generally take effect on January 1, 2027.
This year's enrollment period is especially important because Medicare beneficiaries may face changes in plan availability, premiums, prescription drug coverage, and provider networks. Reviewing coverage early can help seniors avoid unexpected medical expenses and select a plan that better fits their healthcare needs.
The Centers for Medicare & Medicaid Services (CMS) is encouraging beneficiaries to compare their options and use official Medicare resources before making a decision.
When Does Medicare Open Enrollment Start?
The Medicare Open Enrollment period runs from October 15 through December 7, 2026. During these weeks, people who already have Medicare can make changes to their health and prescription drug coverage for the upcoming year.
Beneficiaries can review available Medicare Advantage plans, change prescription drug plans, or switch between Original Medicare and Medicare Advantage.
People can begin comparing 2027 plans before the enrollment period opens. Medicare's online Plan Finder provides information about available options, estimated costs, and coverage details.
According to Medicare.gov, changes made during Open Enrollment generally become effective on January 1 of the following year, provided the enrollment request is received by the applicable deadline.
Official details are available at Medicare.gov Open Enrollment.
Why Is This Year's Enrollment Important?
Medicare plans can change every year, and beneficiaries should not assume their current coverage will remain exactly the same in 2027.
Insurance companies may adjust monthly premiums, deductibles, copayments, prescription drug formularies, and the doctors and pharmacies included in their networks. Some plans may also change the additional benefits they offer or stop serving particular areas.
Recent reporting indicates that some insurers are reducing their Medicare Advantage offerings for 2027. As a result, certain beneficiaries may need to find a replacement plan if their existing coverage is discontinued.
People should carefully review any notices from their insurance companies and confirm whether their current plan will remain available next year.
Even if a plan is still offered, another option may provide better coverage for a person's medications, preferred doctors, or expected healthcare expenses.
What Are the Different Medicare Coverage Options?
Understanding the main Medicare coverage options can help beneficiaries make informed decisions.
Original Medicare: This federal program includes Part A, which generally covers inpatient hospital services, and Part B, which covers physician services and other outpatient care. Beneficiaries can generally visit providers who accept Medicare. Original Medicare does not include most prescription drug coverage, so people may need a separate Part D plan.
Medicare Advantage: Also known as Part C, these plans are offered by private insurance companies approved by Medicare. They provide Medicare-covered Part A and Part B benefits and often include prescription drug coverage. Many plans use provider networks and may offer additional benefits, but rules and costs vary.
Medicare Part D: These plans help cover prescription medications. Beneficiaries should check whether their specific medicines remain covered and compare the costs associated with different plans.
Medigap: Medicare Supplement Insurance helps eligible beneficiaries pay certain out-of-pocket costs associated with Original Medicare. Medigap policies generally cannot be used with Medicare Advantage, and enrollment rights and underwriting rules can vary.
Before switching coverage, beneficiaries should understand how the change may affect their doctors, medications, and total healthcare expenses.
What Could Happen to Medicare Premiums in 2027?
CMS announced in September 2026 that the weighted average monthly premium across Medicare Advantage plans is projected to decrease from $14.37 in 2026 to $12 in 2027. That represents a projected decline of approximately 16.5%.
However, this is a national weighted average. It does not mean that every beneficiary will pay $12 per month or that every plan will become less expensive.
CMS also projects that the average monthly premium for stand-alone Medicare Part D prescription drug plans will increase from $35.09 in 2026 to approximately $36 in 2027.
Individual costs can vary considerably depending on the plan, location, coverage choices, and the medications a beneficiary takes.
For that reason, seniors should compare the total expected cost of coverage rather than relying only on advertised monthly premiums.
CMS's official announcement provides additional information about projected costs and plan availability: Medicare Advantage and Prescription Drug Programs Expected to Remain Stable in 2027.
Five Things Seniors Should Check Before December 7
Beneficiaries can prepare for Open Enrollment by reviewing five important areas.
1. Review your Annual Notice of Change. This document explains changes to your existing plan's costs, benefits, and coverage for the following year.
2. Check your doctors and hospitals. Confirm that your preferred healthcare providers will remain in your plan's network if you are considering Medicare Advantage.
3. Compare prescription drug coverage. Check whether your medications are covered and review deductibles, copayments, and pharmacy options.
4. Calculate your total healthcare expenses. Consider premiums, deductibles, copayments, coinsurance, and expected prescription costs.
5. Confirm the deadline. Make any desired enrollment changes before December 7, 2026, and keep confirmation of your enrollment request.
Taking these steps early can reduce the risk of rushed decisions and unexpected coverage problems in January.
How to Compare Medicare Plans for Free
Beneficiaries can compare Medicare plans using the official Medicare.gov Plan Finder.
The tool allows users to review available plans and compare coverage, premiums, and prescription drug costs. People should have their medication list, preferred doctors, and estimated healthcare needs available when comparing options.
For personal assistance, beneficiaries can call Medicare at 1-800-MEDICARE (1-800-633-4227).
People who need additional help may also contact their state's State Health Insurance Assistance Program (SHIP), which provides free, personalized Medicare counseling.
Beneficiaries should be cautious about unsolicited calls, misleading advertisements, or anyone demanding payment to access Medicare enrollment services. They should verify information through official sources before sharing personal or financial details.
What Happens After Open Enrollment Ends?
The fall enrollment period ends on December 7, 2026. Changes made during the period generally become effective January 1, 2027.
Some beneficiaries may have additional opportunities to change coverage later, depending on their circumstances and the rules of the applicable enrollment period. For example, people already enrolled in Medicare Advantage generally have a separate opportunity to switch plans or return to Original Medicare from January 1 through March 31.
That later period has different rules and does not provide every enrollment option available during fall Open Enrollment.
Beneficiaries should therefore review their choices before the December deadline rather than assuming they can make any change at any time.
Final Thoughts
Medicare Open Enrollment is an important annual opportunity for Americans to review their health and prescription drug coverage. From October 15 through December 7, 2026, beneficiaries can compare plans and make eligible changes for 2027.
Although national premium projections may look encouraging for some types of coverage, individual costs, benefits, and plan availability differ. The best plan depends on a person's healthcare needs, medications, preferred providers, and budget.
Review your Annual Notice of Change, compare available options through Medicare.gov, and seek help from official Medicare counselors if you are unsure which plan is right for you.
Making an informed decision before the deadline can help you begin 2027 with coverage that better matches your needs.
Official sources:
Medicare.gov — Open Enrollment
CMS — Medicare Open Enrollment Resources
CMS — 2027 Medicare Advantage and Part D Premium Projections
