Quest Diagnostics (NYSE: DGX) is buying California hospital Dignity Health’s lab-related clinical outreach service operations.

The assets provide diagnostic- information services to patients and physician offices in California and Nevada that are outside of a hospital setting. Dignity Health is a San Francisco-based medical center that specializes in poor and underserved patients.

Madison, N.J.-based Quest also provides diagnostic-information services. In January, the company acquired the clinical and anatomic-pathology outreach laboratory businesses of the UMass Memorial Medical Center in Massachusetts. Terms of the deal were not disclosed.