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Medicare Open Enrollment Period Guidance

December 4, 2025

Medicare Fall Period enrollment ends December 7, 2025. We understand how stressful insurance can be. If you are a Medicare or Medicare Advantage patient and you still have questions, you are not alone.

The following resources are available to assist you with any remaining questions you may have:

  • Illinois Senior Health Insurance Program (SHIP)

A free statewide health insurance counseling service for Medicare beneficiaries and their caregivers who will assist you in making informed health insurance decisions.

Website: https://ilaging.illinois.gov/ship.html

Phone: (800) 252-8966

Email: [email protected]

  • Illinois 2025 Medicare Choices Guide:

https://ilaging.illinois.gov/content/dam/soi/en/web/aging/ship/documents/medicare-choices.pdf

  • U.S. Centers for Medicare and Medicaid Services (CMS)

Website: www.Medicare.gov

Phone: 1-800-MEDICARE (800-633-4227); TTY 877-486-2048

Medicare Plan Finder Website: https://www.medicare.gov/plan-compare/#/?year=2026&lang=en

Enrollment Period Explanations: https://www.medicare.gov/basics/get-started-with-medicare/get-more-coverage/joining-a-plan

  • Member Services of your current insurer: Utilize the phone number provided on the back of your insurance card.
  • Your insurance agent or broker

ADDITIONAL OPEN ENROLLMENT PERIOD:

Medicare Advantage Patients have an additional Open Enrollment period in which they can make a switch to another Medicare Advantage Plan or revert to Original Medicare:

Enrollment period:You can:Coverage starts:
Medicare Advantage Open Enrollment Period
(only if you’re already in a Medicare Advantage Plan) January 1-March 31.
Switch to another Medicare Advantage Plan with or without drug coverage.Drop your Medicare Advantage Plan and return to Original Medicare.  You'll also be able to join a separate Medicare drug plan.First of the month after the plan gets your request.

Table above contains information from https://www.medicare.gov/basics/get-started-with-medicare/get-more-coverage/joining-a-plan