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The state of Illinois TRAIL Medicare Advantage Prescription Drug (MAPD) open enrollment period for participating annuitants and survivors is October 15 through November 15, 2023. The 2024 plan year will begin January 1, 2024, and will run through December 31, 2024.

The state of Illinois offers retirees, annuitants, and survivors (of the State Employees Group Insurance Program (SEGIP), The Teachers’ Retirement Insurance Program (TRIP), and the College Insurance Program (CIP)) a healthcare program entitled Total Retiree Advantage Illinois (TRAIL). This program provides Medicare-eligible members and their covered dependents comprehensive medical and prescription drug coverage through TRAIL Medicare Advantage Prescription Drug (commonly referred to as MAPD) plans.

Members who are newly eligible for Medicare have two opportunities for enrollment:

Initial Enrollment: this is offered to all Medicare-eligible retirees and their Medicare-eligible dependents within 60 days of the 65th birthday (of the youngest enrollee). Initial enrollment is a one-time offering.

Open Enrollment: an annual enrollment period held in the fall of each year. This enrollment period is open for Medicare-eligible retirees, survivors, and their dependents to change their elections, or for anyone who previously waived or canceled coverage to re-enroll.

To be eligible for coverage under a Total Retiree Advantage Illinois Medicare Advantage Prescription Drug (MAPD) plan, members and their eligible dependents must:

• Live in the United States or the U.S. Territories, and

• Be retired and enrolled in Medicare Parts A and B, due to age or disability.

Retirees and survivors eligible for the TRAIL MAPD Program will receive a Decision Guide in the mail, notifying them of their eligibility and the requirement to enroll or waive coverage, during the TRAIL MAPD Open Enrollment Period.

FY 2024 TRAIL Open Enrollment – College Insurance Program (

FY 2024 TRAIL Open Enrollment – State Employees Group Insurance Program (

The state is also offering in-person 2024 TRAIL educational seminars. To view dates and locations, click here.

Members who are currently enrolled in TRAIL MAPD do not need to do anything during the Open Enrollment Period unless they want to add or drop a dependent, or make a change to their current TRAIL MAPD coverage for the 2024 plan year. Members may complete changes online at or contact MyBenefits (toll-free) 844-251-1777 during the Open Enrollment Period.