My practice is merging with a larger practice on 03/01/2016. we were told this last week...the incoming practice is saying that our Therapist who will remain for the next few months will still be seeing patients however we must bill under a therapist that is already credentialed to the new group. For Medicare I know this could be a few months to actually remove him from one group to the other. Is it legitimate to have this therapist services billed under another therapists NPI? It was my belief that all of the credentialing and reassigning of benefits must be completed before billing can be done. In addition the facility that is taking over has not added this location to their practice via a 855R....Yet they are telling us that this is what we are to do....Does anyone eles out there find this disturbing?