Medicare supplements, also referred to as “Medigap” plans cover costs that Original Medicare (OM) does not. There are several different plans to choose from to fit your budget. All Medigap plans have a monthly premium. The maximum out-of-pocket (MOOP) is very low for some plans. Medigap plans DO NOT include coverage for prescription drugs, vision, dental, hearing or long-term care. These coverages may be purchased separately.