Testing Locations » New Hampshire » Derry NH » Quest Diagnostics – Derry – Employer Drug Testing Not Offered Quest Diagnostics – Derry – Employer Drug Testing Not Offered Quest Diagnostics – Derry – Employer Drug Testing Not Offered6 Tsienneto RoadSuite Ll102Derry, NH 03038-1584 United States Open for walk-ins only during business hours Monday-Saturday