Centene CEO Michael Neidorff said Tuesday (April 26) that the insurer continues to do well in the exchange market, largely because it has focused on consumers that churn from marketplace plans into the company's Medicaid products. Neidorff said in the company's first-quarter earnings call that as of March 31 Centene had about 680,000 exchange enrollees, and expects to end the year with about 550,000 due to normal attrition. “We are achieving margins at the higher end of our targeted range,”...