nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqafz9jadkpqzaedvclkth4vcm6q9fsvy6mfddq0ufwjpy4gptlwxqs0ryua (nprofile…ryua)
Medicare is a national health insurance plan mostly for people over 65. (https://www.medicareresources.org/basic-medicare-information/brief-history-of-medicare/)
Medicaid is for low-income and disabled people. It's a lot more complicated because lots of people consider those categories to be personal failings rather than affilictions.
Medicare Advantage is a privatized shell around Medicare that makes it act like an Health Maintenance Organization. That lets them overrule the doctors on what care is needed.