Medicare is a single-payer national health insurance program.
On average, Medicare covers half of the healthcare charges for those enrolled.
The enrollees must then cover their remaining costs, either with supplemental insurance, separate insurance, or out of pocket.
Out-of-pocket costs will vary depending on the scope of healthcare a Medicare enrollee requires.
These out-of-pocket costs might include deductibles, copays, and costs of uncovered services, i.e., long-term, dental, hearing, vision care, and supplemental insurance premiums.