Do I need to complete an Electronic Connectivity Request (ECR) form for each provider number?

If you are a company that sends transactions on behalf of health care providers or you are a large provider institution that submits transactions on behalf of multiple provider groups, you will need to identify each group Blue Cross NC Provider ID for which you transmit files. However, you can send all group provider identifiers for which your organization is responsible on one form, using additional sheets of paper if necessary. However, separate forms must be submitted for 837 Institutional Provider Identifiers and 837 Professional Provider Identifiers.