The nation’s largest exchange insurer will be expanding into 400 new counties in 13 of its existing states and enter New Mexico and Michigan for the 2021 benefit year, Centene Corporation Chairman Michael Neidorff announced Friday (Sept. 11), only days after Cigna also said it would be expanding into new areas. With the addition of New Mexico and Michigan, Centene will now offer its Ambetter-branded plans in 22 states, the company said. “At a time when many Americans are grappling...