I worked in hospitals for 41 years, the last 18 as a CEO. I tolally agree with M.Ray's post as follows: 

"My 2 cents as a physician, the only reliable way is word of mouth. Especially if that mouth belongs to a health care worker.  Nurses are best, they know who is crap and who isn't.

 All the other consumer web sites, state licensing boards, waste of time.  They won't tell you what YOU want to know.  If the doctor is competent and personable.  All these consumer sites will tell you is that he/she is board certified and no lawsuits.  How does that help you?"