For most people, the key enrollment period for 2027 Medicare coverage is Medicare’s annual open enrollment, running from October 15 through December 7, 2026. This is the window to compare plans, move from one Medicare plan to another, add or drop Part D prescription drug coverage, or return to Original Medicare from Medicare Advantage. Changes generally take effect January 1, 2027.
Before you sign an application, confirm that your doctors, preferred hospitals, medications, pharmacies, and expected travel needs fit the plan’s network and rules. Eligibility for a Special Enrollment Period can create another opportunity to make changes after a move, loss of other coverage, Medicaid eligibility, or certain plan changes, though the timing and options vary. If you are already enrolled, do not assume your current plan will remain the best fit: annual notices may show changed premiums, formularies, deductibles, or provider networks.
Take time to review the evidence of coverage and compare alternatives before you agree to anything. A licensed agent or plan representative should obtain your consent before discussing or completing an enrollment, but a signature alone does not replace careful comparison.