Hey! I have worked in an out of network office setting, but I am now assisting in the start up with a new office. He is non participating and is a brand new office. He wants to remain out of network, but how do I let insurance companies know who he is, Tax ID, NPI, etc so that we are able to bill, verify benefits, etc? It has been difficult to get a rep on the phone or a rep in the correct departments. Any information would be great, thanks.