Testing Locations » Florida » Fort Pierce FL » Quest Diagnostics – Fort Pierce – Employer Drug Testing Not Offered Quest Diagnostics – Fort Pierce – Employer Drug Testing Not Offered Quest Diagnostics – Fort Pierce – Employer Drug Testing Not Offered1803 S 25Th StSte 3Fort Pierce, FL 34947-4747 United States Across from Lawnwood Hospital.rn4th Wednesday of every month site close early at 1:30pm for training.