No first hand info but here's the superpages - pain management results.
http://www.superpages.com/yellowpage...OR/T-Portland/


I would start by calling the phys therapy places and asking if they can give some names of good PM docs. They should have an idea of who is doing a good job by the patients they treat with phys therapy.
Some might be in uncontrolled pain quite often and some might be having better controlled pain.
When you see a PT you usually have lots of time to talk and they probably know who has what dr, or the client/patient will mention names and if good or not...
You might even get further/better info if you can talk to the PT's in person..
If I had to go that route that's what I would do, then see who comes out at the top of the list.