2015 Insurance Directory Author:Optum360 Many insurance companies have changed their addresses, phone or fax numbers, or websites in the past year. Optum verifies the accuracy of the Insurance Directory, by calling each insurance company listed to provide you with the information you need to process claims with confidence. Key Features and Benefits: NEW Internet Health Plan Directory P... more »rovides direct hyperlinks to key pages for claims, medical policies, credentialing and pharmacy for more than 400 insurers. The fastest way to find answers your most complex questions. Current insurance company information. Includes names, electronic payer ID, phone and web addresses, so you can submit claims and get answers without delay. Save time with hard-to-find addresses for paper clams submission and live-person provider telephone contacts. Know who to contact. A complete listing of state insurance commissioners and workers compensation boards is provided. Step-by-step instructions for the CMS-1500 form make submissions easier to complete.« less