That system did not disappear, you can still have a doctor come to you if you can afford it. But, in general, healthcare in the US is really expensive, which means that some people can not afford it. That's why you have medicaid programs such as california's to help the poor bastards. Furthermore, medi-cal is nothing like the universal healthcare we have in continental europe. Different things. Medicaid programs are government funded whereas universal healthcare is a country-wide compulsory health insurance structure, not government-funded as medi-cal.