The uninsured have no access to healthcare. Do they get treated? Actually healthcare can be much less expensive than health insurance as most individuals have figured out. If they do not want to pay the $100 to see the doctor, they can visit the local ER where they will be evaluated and frequently treated without payment.
Most hospitals require physicians to take call which legally obligates physicians to provide care to patients without regard for ability to pay. On the other hand, when I perform surgical procedures when called to the hospital by the ER, I routinely do not charge those who are unemployed or clearly lack the ability to pay.