That's not the question I asked, but you're still heading down the road to being incorrect. The fact is that charitable giving, need-based aid, philanthropic donations, government assistance, and other forms of subsidy fund *roughly half of the sum total American healthcare costs.* That's trillions of dollars.
Maybe not according to your personal definition. Government welfare is a form of institutionalized or compulsory collective charity, although it is not “charity” in the private voluntary sense.
Regardless of whether or not you agree with any specific definition, the state of US healthcare is such that half of all spending needs to be subsidized in one form or another. To remove even the paltry billions that may fit under a strict category of “voluntary charitable giving” would be a disaster.