Medicare and Medicaid both help people to get access to medical care, but there are important differences between the programs. Medicaid is a program for people with lower incomes and it can cover people of all ages, provided that you meet eligibility criteria. Medicare is a program that only provides coverage to seniors. Medicare is not a means-tested program. You pay into the Medicare program with your taxes as you work and you become eligible for benefits as a senior. It does not matter how much money you have, you can still get Medicare. Medicaid, however, covers some things that Medicare does not cover and Medicare has higher co-insurance costs for many kinds of medical services that you receive.