It actually doesn't have it's own clearinghouse but it does connect with Availity and Office Ally, both of which are free (or a small monthly fee with Office Ally if you do over 50% Government Payors). Xena was supposed to be released 18 months ago but it appears they are still in the beta phase. At this point I can't give you much info on them as we've had little contact with them for the past 10 months. They have a great concept but are having trouble getting the final product out.