Quest Diagnostics, a provider of diagnostic information services, completed the acquisition of Northern Light Laboratory, an outreach laboratory services business of Northern Light Health, a large integrated healthcare system in Maine. Financial terms were not disclosed. "Diagnostic testing is a highly specialized and rapidly evolving area of medicine. By collaborating with Quest Diagnostics, the industry leader, Northern Light Health positions itself to deliver the highest level of diagnostic innovation, service and affordability while energizing our core focus on patient care," Timothy J. Dentry, Northern Light President and CEO.