Testing Locations » Connecticut » Wallingford CT » Quest Diagnostics – Wallingford North Main Street – Employer Drug Testing Not Offered Quest Diagnostics – Wallingford North Main Street – Employer Drug Testing Not Offered Quest Diagnostics – Wallingford North Main Street – Employer Drug Testing Not Offered863 N. Main St. Ext.# 202Wallingford, CT 06492-0000 United States Mid State Medical Bldg