I have discovered a great resource for checking to see if your doctor has been in trouble or disciplined by his or her state medical board. Below is a list of the boards where you can go and conduct a search to find out about
your doctor's credentials and to see if there have been any actions taken against him or her. It helps to be an informed consumer. I have a doc in DC that has been in some trouble, but he has explained it all to me and I understand what happened and why. At least I have been given the information. Not all docs are forthcoming, though.
http://www.ama-assn.org/ama/pub/category/2645.html