Client Services: (866) 697-8378Courier/STAT: (866) 697-8378**Option 1 then option 6
To find the nearest Quest patient service centers by zip code: www.questdiagnostics.com
23441 Madison Street #300 Torrance, CA 90505
Monday - Friday7:00 am- 5:00 pm
Saturday8:00 am – 12:00 noon
Drug Screen: Monday-Friday 10am - 3pmAdditional staff available
For information about our physicians, services, or classes, please refer to the contact telephone numbers below.