I don't THINK you can go straight from AC to a clearinghouse. It certainly cannot accept the remittances to let you know what cleared and what did not, and that is important.

How are you generating 5010 files? When I go to export, I get:
[Linked Image from amazingcharts.com]

Now I know the options change based on the billing service (and this was set to my prior service (working from a backup), but I don't see a way to do 5010's

Wendell
Pediatrician in Chicago

The patient's expectation is that you have all the answers, sometimes they just don't like the answer you have for them