In case you missed it:
The July 2013 edition of The Record announced that effective August 19, 2013, BCBSM will begin issuing new edits and distributing new informational 277CA reports front-end edits for professional and institutional claims.
The new 277CAX - Professional and 277CAZ – Institutional reports will return informational edits for claims submitted to BCBSM with a NPI/submitter ID combination that does not match their EDI enrollment files for you. As a trading partner, if you get any of these edits, you must correct the problem with your submitter information by the end of 2013. Early 2014, these new “informational” (or warning) edits will become "hard edits," and your claims will be rejected.
If you have questions about the informational edits or hard edits you should check your BCBSM EDDI and web-DENIS message boards or they direct you to their EDI Helpdesk number, which they post as 1-800-542-0945.