Low cost clinics, run by charities and/or local governments, as well as free clinics. I know of one place already, run by a doctor with a practice on the west side of LA who has a cash clinic down by the airport. He’s a great doc and poor people can see him for pennies on the dollar, with no insurance.
Do those clinics pay for brain surgery. Sorry but that is second or third class care - everyone should have access to quality care and not have to be in a position to ask for charity. Healthcare is a necessity and quality care must be available to all.
Charity is not a policy.