Is there a difference between an EDI MTC CO Correction and a MTC 02 Change?

Yes, there is a very important distinction between Corrections and Changes. Use the MTC 02 Change when data previously sent to NJCRIB on either a First or Subsequent Report is identified by the Claim Administrator to be different than previously reported. The MTC CO Correction is used in response to a report previously sent to NJCRIB that NJCRIB acknowledged via the acknowledgment with a "TE" (accepted with errors). The CO must match a previously sent transaction and contain the data element(s) or conditions identified on the acknowledgment as being in error. Refer to IAIABC Claims Release 3 Implementation Guide for additional information (