I wrote earlier:
For those of you unfamiliar with the US’s Medicaid: Medicaid is the only true needs-based governmental “safety net” insurance program in the US. You are generally entitled to it if and when you are entitled to “welfare” (public assistance), but they tend to investigate your overall financial situation. If you have assets, your Medicaid case is subjected to something called a “spend-down”, meaning that they wait for you to liquidate your assets and spend them on health care and then when you are pretty much dead broke they start providing coverage.
The situation where most people not previously impoverished run into Medicaid is with regards to long term care (skilled nursing facility, etc) to which people get discharged if their condition stabilizes but they still need medical care. Very few health insurance systems (Medicare, private) will cover care in such a facility for very long, and after that you’re on your own until/unless you qualify for Medicaid.
So they wait until you empty any bank accounts, perhaps sell your house and move into a rental if you’re a homeowner, etc., and then start paying the nursing home bills.