You should be given a book / list of providers that BCBS recommends / covers. You don’t have to abide by that, but its generally cheaper if you use “in-network”.
As far as “how” to pick one… I dunno. I don’t even remember who referred me to my doc, but I’ve had no problems with him in the last ~8 yaers.
Also… :search: noob.
http://nyspeed.com/forums/showthread.php?t=45518&highlight=karaszewski
http://nyspeed.com/forums/showthread.php?t=43540&highlight=karaszewski