Two government programs that cover completely different people.
Medicare is a federal program primarily for people aged 65 and older. You also qualify if you have certain permanent disabilities or end-stage renal disease, regardless of your income. It functions like an insurance policy where you pay premiums and deductibles. It is consistent across every state.
Medicaid is a joint federal and state program designed for people with limited financial resources. It covers low-income adults, children, pregnant women, and people with complex health needs. Eligibility depends on your state of residence and your household income. Benefits and enrollment rules vary significantly depending on where you live.
Some people qualify for both programs and are known as dual-eligible. In this situation, Medicare acts as your primary insurance for hospital and doctor visits. Medicaid steps in to cover the gaps, such as copays and long-term care services like nursing homes. This structure reduces your out-of-pocket costs significantly.
Healthcare billing is inherently messy because these programs have different administrative structures. You will often see separate Explanation of Benefits forms if you have both plans. Keep your cards organized and always show both to the hospital registration desk. If a bill seems wrong, ask the hospital’s patient advocate to verify that they billed the correct primary insurance first.