CareSource, headquartered in Dayton, Ohio, acquired a United Healthcare plan to become the largest Medicaid HMO in Ohio and the second largest in the U.S.
The company is headquartered in Dayton, Ohio. In 1996, the DAHP expanded into the Columbus market with their Medicaid plan by buying the plan United Healthcare was administering. With this expansion, the Dayton Area Health Plan became the largest Medicaid HMO in Ohio. In 2004, the organization was ranked the sixth-largest Medicaid managed care plan in the United States by Interstudy. 
Dayton, Ohio, United States In 1996, the DAHP expanded into the Columbus market with their Medicaid plan by buying the plan United Healthcare was administering. In 2004, the organization was ranked the sixth-largest Medicaid managed care plan in the United States by Interstudy. 
