Maryland and Prince George’s officials plan to make it official Thursday: there is a deal for a new health care system that will salvage some of Prince George’s Hospital Center and expand medical care in the county.

The Washington Post reported Sunday that a deal was imminent and would include a new-state-of-the-art regional medical center in central Prince George’s County that also may serve neighboring Calvert and Charles counties.

. Maryland Gov. Martin O’Malley (D); Lt. Gov. Anthony Brown (D) and Prince George’s County Executive Rushern L. Baker III (D), who have not publicly disclosed their plans, will announce the details Thursday at a press conference in Upper Marlboro, the Prince George’s County seat.

Officials from the University of Maryland medical system also will be there to explain the new partnership that is expected to bring more medical professionals to Prince George’s, an area that data show is underserved by primary care doctors.

The role of Dimensions Healthcare, the private corporation that has been operating Prince George’s Hospital Center, also could be clarified Thursday. Officials have privately emphasized that the deal with the university system is a “partnership” that will not immediately edge out Dimensions.

On Monday, Dimensions president Kenneth Glover told the Prince George’s County Council, which is also the county’s board of health, that the university system would soon provide orthopedic doctors to Dimensions, in another signal that an agreement was in the works.