The Unitarian Universalist Association (UUA) Health Plan offers a Medicare Supplement policy for qualified age 65+ retirees and for age 65+ active employees. For qualified retirees, there are no special requirements other than being enrolled in Medicare parts A and B. For active 65+ employees, the situation is somewhat more complicated.
Here is a summary of Medicare Supplement Plan F Benefits (PDF).
Please contact us at insuranceplans@uua.org for premium estimates.
Medicare makes a distinction between employers who have more than 20 employees versus small employers who have fewer than 20 employees.