Two Blue health insurers are partnering to acquire interest in one of the largest Medicaid companies in the U.S. to better serve beneficiaries in light of looming changes to the program, starting in 2014.

CareFirst has undergone a reorganization designed to allow the insurer’s clients to receive service from “end to end” from people dedicated to specific delivery channels of the overall business.

After 18 years with Independence Blue Cross, Christopher D. Butler, the insurer’s chief operating officer and executive vice president, announced his retirement.