- Medicare is a social insurance program that provides health coverage to individuals aged 65 and older as well as those who are permanently disabled, regardless of income or health status. It covers over 43 million Americans. - Medicare spending is projected to increase substantially by 2030 as the number of people enrolled is expected to rise from 46 million to 78 million. However, the program is facing financial challenges as costs are expected to exceed funding levels by 2019. - Medicaid provides health coverage to over 74 million low-income individuals, including children, pregnant women, elderly, and disabled. Each state administers its own Medicaid program within federal guidelines.