The US has Medicaid for elderly and people with disabilities, the VA for veterans, and Obamacare for those who can’t afford it. I’m very surprised the idea is national healthcare service doesn’t exist. We can complain about quality of course, but most foreigners either think it’s all private or free healthcare doesn’t exist.
We have a choice: free (often crappy care), pre regulation health trials, expensive experimental treatment , cutting edge medicine from specialists like the Mayo Clinic, Cleveland Clinic or University of Chicago, and healthcare from work off the top of my head.