Testing Locations » Maryland » Dundalk MD » Quest Diagnostics – Dundalk – Employer Drug Testing Not Offered Quest Diagnostics – Dundalk – Employer Drug Testing Not Offered Quest Diagnostics – Dundalk – Employer Drug Testing Not Offered7544 Holabird AveSuite A1Dundalk, MD 21222-2104 United States Next to Salvo Auto Parts.rnPlease note: This Patient Service Center does not collect drug screens.