Testing Locations » Massachusetts » Brockton MA » Quest Diagnostics – Brockton Oak Street – Employer Drug Testing Not Offered Quest Diagnostics – Brockton Oak Street – Employer Drug Testing Not Offered Quest Diagnostics – Brockton Oak Street – Employer Drug Testing Not Offered830 Oak StreetSuite 103 WestBrockton, MA 02301-1168 United States Medical Office Building