What type of Medicare plan is exclusively available through employer groups?

The type of Medicare plan that is exclusively available through employer groups is Employer Senior Supplement Group Retiree Plans. These plans are designed specifically for retirees who receive benefits through their former employer. They often supplement original Medicare (Parts A and B) by providing additional coverage to help reduce out-of-pocket costs or enhance coverage, and they are typically only offered to individuals who are part of a particular employer's retiree group.

This type of plan can provide unique benefits tailored to the needs of the employer’s retirees, such as lower premiums or additional services that are not generally available through standard Medicare plans. While Medicare Advantage Plans, Original Medicare Plans, and Medicare Prescription Drug Plans are available to individual beneficiaries, the Employer Senior Supplement Group Retiree Plans are distinctive because they are formed and structured under employer sponsorship, making them accessible solely to retirees associated with that employer.