Below are steps to contact Quest Diagnostics customer service and get a live person on the phone:
- Dial 1-866-697-8378
- Say “speak with an agent”
- Say “other” or press 3
- Say “it something else” or press 5
- Enter or Say your local main office phone number
- Stay on the line
- The automated phone system will connect you to a live customer service agent from Quest Diagnostics
Quest Diagnostics Voice Main Menu
- Press 1 if you are a patient.
- Press 2 if you know your party’s extension.
- Press 3 for your direct deposit.
Quest Diagnostics Customer Service Representatives Hours
Live Quest Diagnostics customer service is available from 8am to 5pm EST Monday-Friday, Saturday-Sunday closed.
Quest Diagnostics Support Phone Numbers
- Quest Diagnostics Support Phone Number: 1-866-697-8378. Live Quest Diagnostics customer service is available from 8am to 5pm EST Monday-Friday, Saturday-Sunday closed.
- Quest Diagnostics Employer Solutions: 1-800-877-7484.
- Nichols Institute, San Juan Capistrano: 1-800-553-5445.
- Nichols Institute, Chantilly: 1-800-336-3718.
- Nichols Institute, Valencia: 1-800-421-4449.
- Quest Diagnostics Genomic Services: 1-866-436-3463.
- AmeriPath: 1-800-890-6220.
- Dermpath Diagnostics: 1-800-890-6220.
- Cleveland HeartLab: 1-866-358-9828.
- Diagnostic Laboratory of Oklahoma (DLO): 1-800-891-2917.
- ExamOne: 1-877-933-9261.
Quest Diagnostics Web Links
- Quest Diagnostics Web Site
- Quest Diagnostics Facebook page
- Quest Diagnostics Twitter page
- Quest Diagnostics Instagram page
- Quest Diagnostics Youtube page
- Quest Diagnostics Linkedin page
- Quest Diagnostics page with all social media
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
Below are steps to contact Quest Diagnostics customer service by chat:
- Go to the Quest Diagnostics Support page.
- To press the “Chat” icon in the bottom right corner.
- Start chat. Chat is available from 8am to 5pm EST Monday-Friday, Saturday-Sunday closed.
Quest Diagnostics support e-mail
Below are steps to contact Quest Diagnostics customer service by email:
- Billing
- Go to the Billing Services Contact page.
- Fill in the form.
- Press the “Submit” button.
- Locations/Appointments
- Go to the Appointment Scheduling Comments Contact page.
- Fill in the form.
- Press the “Submit” button.
- Patient Inquiry
- Go to the Patient Inquiry Contact page.
- Fill in the form.
- Press the “Submit” button.
Quest Diagnostics Help Center
You can find more information at Quest Diagnostics Support page.