Three holdover companies and one new entrant have been selected as winners of a multibillion-dollar contract to serve more than 1 million Georgia children in lower-income families.

CareSource, an Ohio-based nonprofit health plan, is set to join Amerigroup, Peach State and WellCare to serve low-income adults and children in Georgia’s Medicaid and PeachCare programs.

The deals are not yet final, state officials emphasized Thursday. Losing bidders have a 10-day period to appeal the decision to state contracting officials.

The contract for the “Care Management Organizations’’ is worth an estimated $4 billion over six years. The launch date for the new contract is July 1. Ten other bidders either did not earn scores as high as the four winners or were judged “non-responsive.” 

Amerigroup, a unit of Anthem – the parent company of Blue Cross and Blue Shield of Georgia – will retain the contract for providing health services to foster care children and those in adoption assistance and in the juvenile justice system.

Under its current contract, Amerigroup has been paid about $200 million annually for services to these children. The new deal is subject to appeal by losing bidders.

The Dayton Daily News reported that CareSource said its expansion into Georgia will create 300 jobs, including an estimated 100 employees in Dayton to support the new business, and nearly 200 employees to staff its Southern regional headquarters.