In January of this year Arkansas Blue Cross and Blue Shield became the single Blues Plan to administer health plan benefits for Walmart associates.

The new alpha prefix for Walmart associates is "WMW". 

A significant number of 2010 claims are still being filed using the old alpha prefixes. Please note: Effective July 1, 2010, we are no longer accepting claims with the following alpha prefixes for 2010 dates of service:: WLA, WMR and MRT. 

Please remember to request to see the member's new ID card at the time of service and submit all 2010 claims to BCBSIL using the exact ID number as it appears on the card. Using the old alpha prefixes will cause your claims to reject.