CareSource said Tuesday it will add 200 new jobs on top of the 150 jobs announced Monday as the Medicaid provider’s business continues to expand.

The 200 jobs — about half of which will be added at the North Main Street headquarters in downtown Dayton — will come later this year or early next year.

The company is one of five managed care plans chosen by the Ohio Department of Job and Family Services to provide coverage for people in Medicaid’s Covered Families and Children and Aged, Blind and Disabled programs.

The jobs announced Tuesday will mostly be infrastructure and IT jobs, said CareSource CEO and president Pamela Morris, including systems engineers, database engineers, business process analysts and Web developers to handle the additional Medicaid clients the company expects through its Ohio contract. Some clinical jobs will also be added, including nurses, social workers and pharmacists.

The 150 new jobs announced Monday will be created this year at CareSource’s downtown headquarters through a new partnership with Louisville-based Humana. Under the partnership, the two firms will provide coverage for people who are eligible for both Medicare and Medicaid. And in December, the company announced it would 150 jobs statewide, including 35 in the Dayton region.

CareSource’s growth falls in line with development officials’ plans to add biosciences and healthcare jobs to the region, said Jeff Hoagland, president and CEO of the Dayton Development Corporation.

“A rising tide rises all boats. And slowly but surely, we have a steady plan in place, and we’re starting to see things happening,” Hoagland said.

CareSource’s growth downtown is more evidence of increased interest in downtown Dayton, said Sandy Gudorf, president of the Downtown Dayton Partnership. The organization offers a “site seeker” program to find suitable locations for businesses interested in locating downtown, and more businesses are taking advantage of the program, she said.

In 2008, 19 businesses made queries about downtown locations. Last year, there were 71 queries, and so far this year, there have been 41 queries.

Morris couldn’t say Tuesday how many new Medicaid clients CareSource will gain with the new state contract. Several plans that weren’t chosen by the state for its new managed care program are protesting the state’s decision, and a final decision hasn’t been made yet on how the program will be set up.

CareSoure Humana announced their new partnership in March. Humana brings 5 million Medicare members to the table, while CareSource covers more than 900,000 people on Medicaid, mostly in Ohio.

On Monday, the Ohio Tax Credit Authority approved a 40 percent, seven-year job creation tax credit for CareSource’s expansion project. The project will generate $6.3 million a year in new payroll revenue, and keep $59.3 million in existing payroll in the region.

Contact this reporter at (937) 225-7457 or peggy.ofarrell@coxinc.com