Madison County Schools Authorized Investment Providers For specific investment provider information, please click on the investment provider name of your choice to visit the company's website. 403(b) TIAA(800) 842-2252 457(b) TIAA(800) 842-2252 Roth 403(b) TIAA(800) 842-2252 Roth 457(b) TIAA(800) 842-2252