Catamaran Corporation (formerly SXC Health Solutions) is the former name of a company that now operates within UnitedHealth Group's OptumRX division (since July 2015). It sells pharmacy benefit management and medical record keeping services to businesses in the United States and to a broad client portfolio, including health plans and employers. Working independently of the government and insurance companies allowed it to operate as a third party verifier; the RxCLAIM online claim processing system allowed for prescription drug claims to be processed online if the customer lived in and filled his/her prescription in the United States. SXC had three separate but interrelated business segments which dealt with prescription drug programs. For 2013, 23% of company revenue came from Cigna Corpor