Medicare Open Enrollment Opens October 15, 2026; Low Premiums and New Part D Rules Put Choices Back on the Table

Medicare annual open enrollment opens today, October 15, 2026, beginning a seven week period when people with Medicare can review, compare, and change their health and prescription drug coverage for 2027. The window runs through December 7, and coverage elected during this time takes effect January 1, 2027.

What changed for 2027 and why it matters

The Centers for Medicare and Medicaid Services released plan data and projections ahead of the enrollment start that paint a markedly different picture from recent years. CMS reports that the weighted average monthly premium for Medicare Advantage plans is projected to fall from about $14.37 in 2026 to roughly $12.00 in 2027. At the same time, average prescription drug costs inside Medicare Advantage plans are expected to decline sharply after accounting for manufacturer rebates and program adjustments.

Those changes could lower monthly costs for many beneficiaries who rely on Medicare Advantage and Part D coverage. For people on fixed incomes, even modest premium reductions can free up money for basic needs, while shifts in drug plan designs can alter how quickly enrollees reach deductible or out of pocket thresholds.

Key deadlines and the scope of choices

Open enrollment, often called the Annual Election Period, runs October 15 through December 7. During AEP, beneficiaries may: switch between Original Medicare and Medicare Advantage, change Medicare Advantage plans, or join, drop, or switch Part D prescription drug plans. Any election submitted by December 7 becomes effective January 1, 2027.

Seniors who want to keep their current plan do not need to re enroll unless their plan notifies them that it will not be available next year. Beneficiaries should watch for notices that plans mail in the fall, including the Annual Notice of Change and Evidence of Coverage documents, which describe next year’s costs, covered benefits, and provider networks.

Prescription drug changes and the out of pocket cap

For 2027, CMS data and plan filings reflect implementation of recent federal changes that reshape how Part D costs are counted and capped. The Inflation Reduction Act era protections have been phased in and adjusted, and CMS projections indicate that a growing share of beneficiaries will have access to enhanced Part D options at lower monthly premiums.

One of the most consequential shifts for many beneficiaries is how out of pocket drug spending is limited under new program rules. Plans and advocates emphasize that enrollees should carefully check formularies, pharmacy networks, and cost sharing tiers for drugs they currently take. A lower premium does not always mean lower total yearly drug costs if the plan moves more medicines into higher cost tiers or narrows preferred pharmacies.

Quality data and comparing plans

CMS posted 2027 star ratings and updated the Medicare Plan Finder in time for AEP. Star ratings summarize plan performance on measures ranging from preventive care to prescription drug management. The ratings appear on Medicare.gov and are intended to help beneficiaries compare plan quality alongside costs and provider networks.

Plans can alter provider networks from year to year. Before switching, beneficiaries should use the Plan Finder to confirm that their primary care physician and specialists remain in network under any option they are considering. If a needed provider is out of network for a chosen plan, enrollees may face higher costs or interrupted access to care.

Where to get help and practical steps

People with Medicare and their caregivers can use the official Medicare Plan Finder at Medicare.gov and call 1 800 MEDICARE for assistance. State Health Insurance Assistance Programs offer free, unbiased counseling tailored to each state. Community based organizations, aging services, and local social service agencies often run enrollment assistance events in the fall.

Practical steps beneficiaries should take now include gathering a list of current prescriptions, recent medical visits and preferred doctors, current plan documents, and any notices from their plan. Compare total annual costs not just monthly premiums, because differences in deductibles, copayments, and drug tiers determine actual spending over a year.

Why acting during open enrollment is important this year

This open enrollment season comes after policy and market shifts that have altered plan availability and pricing in several regions. Even beneficiaries who were satisfied last year can see meaningful changes to network access and drug coverage in 2027 filings. Given the combination of lower projected average premiums for Medicare Advantage and altered Part D designs, experts say this year is one where shopping around could produce better alignment between a person’s health needs and the plan they pay for.

Open enrollment closes on December 7. Decisions submitted by that date will determine coverage for the entire 2027 calendar year, except where a later special enrollment period applies. For many Americans on Medicare, the weeks ahead are a rare annual chance to reclaim financial predictability and ensure access to needed care and medicines.