@Cycloptichorn,
Typical Cyclo bluster, but I was interested in seeing if I could find the answer and so I googled it.
I didn't spend a lot of time with this, but found the following:
http://www.kaiserhealthnews.org/stories/2012/august/06/third-of-medicaid-doctors-say-no-new-patients.aspx
http://www.mysanantonio.com/news/local_news/article/Sick-of-status-quo-doctors-test-no-insurance-3500678.php
http://www.dpmafoundation.org/physician-attitudes-on-medicine.html
The second link directly address the question and the answer is uncertain. It appears it's about 1,000. Which is a surprising in the fact that Cyclo, in all his days, has apparently had dealings with virtually every doctor in America and never ran into any that won't accept insurance.
The question is whether or not this is a growing trend. If this approach is being tried in San Antonio, we can be certain that it is being tried elsewhere.
The third link is, as one might expect, contraversial and has factored in the debate about Obamacare with it's opponents citing it as evidence of the ills yet to come, and its supporters ridiculing the survey.
The first link, I believe, tells a darker tale.
If more and more practising doctors are not accepting new medicare patients and the number of patients on medicare is growing, there's a train wreck up ahead.
At some point the government may step in and tell doctors they can't refuse new medicare patients. That will be interesting.
In any case, it's a bit of whistling past the graveyard to assert that Obamacare is not going to have some undesirable (unexpected or otherwise) consequences, but again, we won't have to wait that long to find out.