BlueCORE/SFG Overview

BlueCORE is BlueCross BlueShield of Tennessee's real-time based eligibility, benefits, claim status, and remittance application. BlueCORE follows the standard operating rules defined by CAQH CORE® requirements. For further information on how use BlueCORE, please see the attached Companion Guides.

SFG (Secure File Gateway) is BlueCross BlueShield of Tennessee's Secure file transfer system. SFG adheres to the infrastructure rules defined in the CAQH Payment and Remittance Operating Rules with respect to deliver of Electronic Remittance Advices. For further information on how to obtain access and use SFG, please visit Resources for Providers | BCBS of Tennessee (

Blue CORE 270 / 271 companion guide

Blue CORE 276 / 277 companion guide

Blue CORE 835 companion guide

Holiday Schedule

Blue CORE will not be available on the following Holidays

  • New Year's Day
  • Martin Luther King Day
  • Memorial Day
  • Juneteenth
  • Independence Day
  • Labor Day
  • Thanksgiving
  • Christmas

Regular Scheduled Maintenance

Blue CORE and Secure File Gateway may not be available due to regular system maintenance during the following times:

  • Every Tuesday 7:00 PM - 10:00 PM
  • Every Thursday 5:00 PM - 9:00 PM
  • Every Sunday

Unscheduled Maintenance or Emergency Downtime

None at this time.

For further information about CORE, please visit or contact CAQH at