How to Talk to a Live Person in Quest Diagnostics Customer Service

If you need to speak to a live customer service representative in Quest Diagnostics customer service you need to dial 1-866-697-8378. To speak with a live agent, you need to press 1 (if you are a patient), then press 5 (for additional help), after say “speak with a representative” and stay on the line (typical waiting time is about 5-10 minutes).

Alternatively you can use the following other options available in the customer service phone menu:

  • If you are a patient press 1.
  • If you know your party’s extension press 3.

If you or press 1 in the above menu you will get the following sub-menu:

  • To find a location near your or hear hours of operation say “Location” or press 1.
  • For appointments say “Appointments” or press 2.
  • For pricing and billing questions say “Pricing and billing” or press 3.
  • For test results say “Test results” or press 4.
  • For additional help say “Additional help” or press 5.

Quest Diagnostics Customer Service Hours

Live customer service representatives from Quest Diagnostics are available from 8am to 5pm EST Monday-Friday, Saturday-Sunday closed.

Quest Diagnostics Customer Support Phones

  • Quest Diagnostics Customer Support Phone is 1-866-697-8378. Live customer service representatives from Quest Diagnostics are available from 8am to 5pm EST Monday-Friday, Saturday-Sunday closed.
  • For Quest Diagnostics Employer Solutions you need to dial 1-800-877-7484.
  • For Nichols Institute, San Juan Capistrano you need to dial 1-800-553-5445.
  • For Nichols Institute, Chantilly you need to dial 1-800-336-3718.
  • For Nichols Institute, Valencia you need to dial 1-800-421-4449.
  • For Quest Diagnostics Genomic Services you need to dial 1-866-436-3463.
  • For AmeriPath you need to dial 1-800-890-6220.
  • For Dermpath Diagnostics you need to dial 1-800-890-6220.
  • For Cleveland HeartLab you need to dial 1-866-358-9828.
  • For Diagnostic Laboratory of Oklahoma (DLO) you need to dial 1-800-891-2917.
  • For ExamOne you need to dial 1-800-677-6726.

Quest DiagnosticsĀ Social Networks Customer Service

Quest Diagnostics Mailing Addresses

Quest Diagnostics Clinical Laboratories, Inc.:
500 Plaza Drive
Secaucus, NJ 07094

Quest Diagnostics Infectious Diseases, Inc.:
33608 Ortega Highway
San Juan Capistrano, California 92675

Quest Diagnostics Ventures LLC:
500 Plaza Drive
Secaucus, New Jersey 07094

Quest Diagnostics Live Chat Support

You can start a live chat session with a Quest Diagnostics Support Agent on the Quest Diagnostics Support page. To speak with a live agent, you need to press the “Chat” icon in the bottom right corner of the page.

Quest Diagnostics support e-mail

  • To contact Billing inquiry via e-mail you need to go to the Billing Contact page, fill in the form and press the “Submit” green button.
  • To contact Patient Service Center location questions via e-mail you need to go to the Patient Service Center Contact page, fill in the form and press the “Submit” green button.

Quest Diagnostics Help Center

Quest Diagnostics Opening Hours

Monday 8am to 5pm EST
Tuesday 8am to 5pm EST
Wednesday 8am to 5pm EST
Thursday 8am to 5pm EST
Friday 8am to 5pm EST
Saturday closed
Sunday closed