Amends the State Employees Group Insurance Act of 1971. Provides that, notwithstanding any other provisions of the Act, the Department of Central Management Services, in consultation with and subject to the approval of the Chief Procurement Officer, shall contract or make otherwise available a Medicare plan to supplement Medicare Parts A and B and to provide coverage compliant with Medicare Part D for Medicare-primary members and their Medicare-primary dependents. On January 1, 2027, requires the Department to begin procurement of supplemental Medicare plans to be effective on January 1, 2028. Provides that the Department shall award contracts to provide a minimum of 2 supplemental Medicare plan options if 2 or more responsive bidders submit bids. Effective immediately.