Human Resources - Benefits

Administration Division

Post-65 Retiree USG Open Enrollment

USG retirees over the age of 65 receive supplemental insurance through the Aon Retiree Health Exchange, in addition to any USG plans that they may choose to enroll in.

USG and the Aon Retiree Health Exchange do not have the same Open Enrollment periods, meaning you’ll have a few important dates to remember if you’d like to change your coverage. No worries! We’re here to help.

Aon Retiree Health Exchange Medicare Open Enrollment

What is it?
Medicare coverage provided through the Aon Retiree Health Exchange

When is Medicare Open Enrollment for 2021 benefits?

  • Medicare Advantage Plans and Prescription Drug: October 15 to December 7, 2020.
  • Medicare Supplemental Plans (“Medigap”): Make changes for January 1, 2021 up until December 31, 2020.

What should I do during Open Enrollment?
If you’re happy with your current coverage, you don’t need to do anything. If you want to change your coverage, this is the time to do so.

How do I make changes?
Visit or call 1-866-212-5052 Monday-Friday, 8 a.m. to 11 p.m. Eastern time. If you have questions, contact the Aon Retiree Health Exchange at 1-866-212-5052 to schedule an appointment with a dedicated Benefits Advisor.

Please note that if you’re enrolled in Supplemental Insurance, don’t worry if your Benefits Advisor schedules an appointment after December 7.

Make the most of your Health Reimbursement Account
If you’re enrolled in a healthcare and/or prescription plan through the Aon Retiree Health Exchange, then you also have access to a Health Reimbursement Account (HRA). This account helps you feel confident in your finances by reimbursing you for eligible premiums and expenses, including most prescription drugs and out-of-pocket healthcare expenses, Medicare Supplemental premiums and vision/dental premiums. USG is pleased to contribute up to $2,736 to your HRA in 2021.

For more information and to manage your HRA, use the Your Spending AccountTM (YSA) website on We’ll also be holding virtual help sessions on December 14, 2020 and January 12, 2021 to help you learn how to best use the YSA website and how to get support. Aon Retiree Health Exchange mailed an RSVP communication mid-November for the December session and will mail an additional RSVP mid-December for the January session.

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