Medicare Part C is a combination of your Part A and Part B options and must cover at least all of the services that Original Medicare covers (Part A and Part B). One difference is that private insurance companies that are approved by Medicare provide this type of coverage. Part C is often a lower out-of-pocket risk alternative to the Original Medicare Plan, and usually provides extra benefits such as vision, hearing, dental, and/or health and wellness programs and may include prescription drug coverage (Part D). Part C plans often have networks in which you must use the doctors or hospitals that are contracted with the plan. Costs for items and services vary by plan and by insurance company. Medicare Advantage plans have several plan types available.