Exhibit 99(b) CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Quarterly Report of Coastal Financial Corporation, Inc. (the "Company") on Form 10-Q for the period ending June 30, 2002 as filed with the Securities and Exchange Commission (the "Report"), I, Jerry L. Rexroad, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C.ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge: 3. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 4. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of and for the period covered by the Report. /s/ Jerry L. Rexroad -------------------- Jerry L. Rexroad Chief Financial Officer August, 14 2002 30 SIGNATURES Pursuant to the requirement of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. COASTAL FINANCIAL CORPORATION August 14, 2002 /s/ Michael C. Gerald - --------------- --------------------- Date Michael C. Gerald President and Chief Executive Officer August 14, 2002 /s/ Jerry L. Rexroad - --------------- -------------------- Date Jerry L. Rexroad Executive Vice President and Chief Financial Officer 31