Testing Locations » California » Carmichael CA » Quest Diagnostics – Carmichael 6620 Coyle – Employer Drug Testing Not Offered Quest Diagnostics – Carmichael 6620 Coyle – Employer Drug Testing Not Offered Quest Diagnostics – Carmichael 6620 Coyle – Employer Drug Testing Not Offered6620 Coyle AvenueSuite 100Carmichael, CA 95608-6336 United States