http://www.cnsnews.com/mrctv-blog/barbara-boland/over-214000-doctors-opt-out-obamacare-exchanges
ver 214,000 doctors won't participate in the new plans under the Affordable Care Act (ACA,) analysis of a new survey by Medical Group Management Association shows. That number of 214,524, estimated by American Action Forum, is through May 2014, but appears to be growing due to plans that force doctors to take on burdensome costs. It's also about a quarter of the total number of 893,851 active professional physicians reported by the Kaiser Family Foundation.
It seems that doctors are not simply going to resign but refuse to participate in the Obamacare program. In the UK some doctors work for the National Health while also sometimes taking private patients. It's perfectly legal. The main problem for government programs are the huge waiting rooms. Then someone can wait a few hours to see the doctor.
If the US does find itself short of doctors, there are plenty from Cuba