how to find doctor | ADHD Information

I live in MD - I take my son to Kennedy Krieger Institute in Baltimore - the outpatient  unit.  He has ADHD, ODD and mood disorder. I did take him somewhere else and they didnt know how to handle him. I will never take him anywhere else.   http://www.kennedykrieger.org/

I am new to this or any site and have a question.  My son is 16 and ADD.  I have been having trouble finding a good doctor to treat his ADD.  We live in the Annapolis, MD area.  Anyone know how to find a reputible doctor in my area?  Any help would be appreciated.