Quest Diagnostics has completed its acquisition of the Worcester-based clinical outreach laboratory business of UMass Memorial Medical Center. Financial terms were not disclosed.

In addition, Quest Diagnostics has finalized a lease agreement for 200,000 square feet of lab space in a portion of the former Hewlett Packard complex on Forest Street in Marlborough.

The testing services of the acquired UMass Memorial laboratory businesses, as well as Quest Diagnostics’ existing full-service clinical laboratory in Cambridge, Mass. and its Athena Diagnostics specialty neurology testing subsidiary in Worcester, will transition to the new Marlborough facility when it becomes fully operational, which is expected to take 18 to 24 months.

"Our UMass Memorial relationship and planned ‘lab of the future’ represent a new model for delivering diagnostic information services for our nation’s increasingly cost-pressured healthcare system," Steve Rusckowski, Quest’s president and CEO, said in a statement. "We look forward to bringing together the academic expertise of UMass Memorial with the advanced testing, scale and operational excellence of Quest Diagnostics’ independent lab business."