Testing Locations » California » San Clemente CA » Quest Diagnostics – San Clemente Avenida Vista Hermosa – Employer Drug Testing Not Offered Quest Diagnostics – San Clemente Avenida Vista Hermosa – Employer Drug Testing Not Offered Quest Diagnostics – San Clemente Avenida Vista Hermosa – Employer Drug Testing Not Offered1300 Avenida Vista HermosaSte 160San Clemente, CA 92673-6315 United States Located in Saddleback Memorial Health building.