BlueCross BlueShield of Tennessee is again trying to ease doctors' concerns about a tool to allow its members to compare quality and costs of care. Doctors will have 45 days to review their profiles and update information on their medical claims, which underpins the rating system. Blue Cross plans to consider doctors' feedback before the online tool goes live Sept. 15. A rollout was planned for April but was delayed after doctors raised concerns about the accuracy of their individual information and about the use of claims data.