Cigna Corp. announced Wednesday it completed its purchase of Medicare Advantage plans from Arcadian and Humana in Arkansas, Oklahoma and Texas.

Starting Jan. 1, about 4,500 Medicare Advantage customers who had Humana or Arcadian now have Cigna coverage, which includes HealthSpring. The acquisition includes 35 new counties in and around Amarillo, Texas; Longview-Marshall, Texas; Texarkana, [...]