Obamacare -- which the government typically refers to as Affordable Care Act health insurance marketplace coverage -- is the health insurance that is available to people under the age of 65. Private companies offer Obamacare plans that have varying costs and levels of coverage.
Once you turn 65 -- or, if you are diagnosed with one of a handful of medical conditions -- you’re eligible for Medicare coverage. Medicare is a form of health insurance that the federal government provides. Or, if you prefer, you can sign up for Medicare Advantage, which is offered by Medicare-approved private companies that must follow rules set by the government.