imgabe just said in network not that the claim gets accepted. There's been a couple cases where not everyone administering as part of the procedure was in network so there's a surprise bill for one part [0]. You can do all the right homework to make sure the principal people involved are in network and still get screwed!
If the procedure is not covered it doesn't matter if its in-network. You will face the same issue: the provider doesn't know if he will get paid from insurance until at least 3 weeks later.
