Merced Irrigation District Authorized Investment Providers For specific investment provider information, please click on the investment provider name of your choice to visit the company's website. 457(b) Fidelity Investments - Plan Number: 67859(800) 343-0860 National Life Group(800) 579-2878 Nationwide Insurance Company(800) 848-6331 Orion Portfolio Solutions(800) 379-2513 Pacific Life(800) 722-2333 Security Benefit Group(800) 888-2461