Each clearinghouse that you submit electronic claims to must be added as an electronic receiver in Ascend. This may be the switch vendor (e.g., WebMD) or this may be a payer to whom you are directly submitting the claims (e.g., DMERC).
When you select to E-bill a claim or batch of claims in the NSF or ANSI formats, you will be prompted to select the Electronic Receiver that will receive the claim batch.
Creating_a_claim_batch_for_ANSIX12 837 and/or NSF file transmission