“doctors form private groups that refuse to take Medicaid.”
If it isn’t already in the bill, Obama will have Congress pass a law that all practicing physicians will have to follow the rules of Obamacare.
I saw my doctor on Friday. He mentioned that he would probably be sending me a letter soon, announcing that he'd joined a local medical group (he's currently a sole practitioner). Though he didn't say he was forced or compelled to take such patients, that was the unspoken part of his "increased number of Medicare / Medicaid patients" comment. Basically, he now has to find a way to share overhead costs, in order to offset Obamacare related losses.