The Medicare Flex Card is a specialized benefit offered through certain Medicare Advantage plans and is not available with Original Medicare (Parts A and B). It can be used to cover the cost of services and items such as dentures, eyeglasses, etc., which are often necessary as you get older but can be expensive.
However, not every Medicare Advantage plan includes a Flex Card and the funds available can vary significantly between plans. The card typically operates on a use-it-or-lose-it basis within a plan year without the ability to roll over unused funds.