Exhibit 23 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statement No. 333-111037 on Form S-8 of Civitas BankGroup, Inc. of our report dated June 28, 2005 appearing in this Annual Report on Form 11-K of Civitas BankGroup, Inc. for the year ended December 31, 2004. /s/ Crowe Chizek and Company LLC Brentwood, Tennessee June 29, 2005