The issue I've seen is that carriers made entirely new networks, with new names, that are drastically smaller than existing networks.
Did I mention, they never terminated existing doctors, because technically the old networks still exist? As far as the doctors know, yes, they still accept carrier XYZ. They were never notified a new network exists (the only network available now), and they're not part of it.
It certainly doesn't help that doctors categorically say "we're not taking obamacare", which is parroted by their billing dept/reception. That generally leads to 5-10 minutes of banging your head against something solid while explaining that obamacare is a law, not an insurance company, and repeatedly asking if they participate in ABC network with XYZ carrier.
Did I mention, they never terminated existing doctors, because technically the old networks still exist? As far as the doctors know, yes, they still accept carrier XYZ. They were never notified a new network exists (the only network available now), and they're not part of it.
It certainly doesn't help that doctors categorically say "we're not taking obamacare", which is parroted by their billing dept/reception. That generally leads to 5-10 minutes of banging your head against something solid while explaining that obamacare is a law, not an insurance company, and repeatedly asking if they participate in ABC network with XYZ carrier.