not sure there are many doctors who donate care.  Nor how many free clinics there are.  Most poor areas are under-serviced in medical and dental care as well as being food deserts.  You need to provide a little support to your opinion.  Yes, there is the Emergency Medical Treatment and Active Labor Act (EMTALA) was passed by the US Congress in 1986 for ER visits and to prohibit dumping of poor patients on public hospitals, but most care is NOT emergency service.