This rejection message comes from the payer. This rejection occurs when the payer requires EDI enrollment and they do not have EDI enrollment on file for the billing NPI that you are submitting with.
If you need EDI enrollment forms, you can search form them at : https://www.therabill.com/healthcare-billing-info/office-ally-edi-enrollments.php
IMPORTANT: Once you have heard back from the payer that they have processed and approved your EDI enrollment, you must e-mail email@example.com to let us know. When e-mailing, please supply the payer name as well as the NPI that was approved.
For more general information on EDI Enrollment, please see: https://therabill.zendesk.com/entries/25392029-ERA-EDI-Pre-enrollment-Set-Up