We have always left box 11C empty for our Blue Cross plans because Office Ally automatically put BL in 11C. However, all of our claims are rejecting because it is going to BC with an 11 in the box instead. I have talked to OA several times, each time telling me that they will email me directions for 11C, which they do, but it only addresses all other payers except Blue Cross. I can add "Comm" in 11C to get them thru the door, but it still is not BL when it gets to the payer. (ex: for Medicare plans, we put medicare. Medicaid plans, Medicaid, etc) Does anyone understand what I am talking about or having the same issues? We lost our biller and I am trying to figure out what to do until I get a replacement. Thanks!