Quest Diagnostics

Quest Diagnostics provides laboratory diagnostic testing and services to patients, physicians, hospitals, health insurers, employers and government agencies.

Telephone
Customer service : (866) 697-8378
Email
Mailing address
500 Plaza Drive
Secaucus, NJ 07094
Website
questdiagnostics.com

What you need to know about Quest Diagnostics

The biggest problem customers have with Quest Diagnostics (the only problem, as far as we can tell) is overbilling. Quest customers complain about getting overcharged for their lab work. We've covered it before and we will probably cover it again. The company requested payment from the patient a year after the claim was closed.

How to resolve a problem with Quest Diagnostics

Try self-service first

Use our proven resolution methods, or Quest Diagnostics’s self-service links below.

Contact an executive

Start with the primary contact below, then escalate step by step if needed.

Get free advocacy help

Contact Elliott Advocacy for free mediation of unresolved complaints.

Note: If you’re having customer service trouble, please use our proven methods for fixing any consumer problem before contacting a manager.

We care about accuracy. If any of the following email addresses bounce back or the phone numbers are incorrect, please report it to us immediately through this form.

How fast does Quest Diagnostics respond?

Phone support

For further information please call (855) 392-6361 between 7:00 a.m. to 5:00 p.m. Pacific time from Monday – Friday.

Email support

No email support available. Online contact form available at questdiagnostics.com. Response time from one to three business days.

Live chat support

Quest does not currently offer live chat.

Social media

Active on Facebook and X (@QuestDx); limited support scope — directed to phone for sensitive issues.

Access Quest Diagnostic's social media accounts here.

Help center/FAQ

Available at myquest.questdiagnostics.com covers billing, results, appointments, and MyQuest

Verified contacts

Quest Diagnostics customer service executives

Maintained by Elliott Advocacy and updated regularly. Here’s how we do it →

Primary
Maria Cecilia Gualberto
Manager Quest Experience Support
Chief Executive
James Davis
Chief Executive

Quest Diagnostics customer service policies

By using QuestDiagnostics.com, you agree to be bound by the terms and conditions. Quest Diagnostics makes no warranties about the accuracy of content on the site and assumes no responsibility for any consequences of actions taken based on information found there — users assume the entire risk. All materials on the site are protected by copyright and may only be used for non-commercial personal purposes. All health-related information you submit is treated as confidential, and the privacy policy governs how your data is collected, protected, and used. Quest will never ask for your password via unsolicited calls or emails, and unencrypted email is not considered a secure form of communication.

Quest Diagnostics loyalty program

Quest Diagnostics does not have a loyalty program.

Frequently asked questions about Quest Diagnostics

Yes, you can find the online contact form here.
Call the main customer service line at (866) 697-8378 or use the online contact form.
Monday to Friday 7 a.m. to 6 p.m.; Saturday 7:30 a.m. to 4 p.m. (all times Central). Quest Mobile is available from 7 a.m. to 5 p.m. Pacific time, Monday to Friday.
Schedule an appointment online through the Quest Diagnostics website or MyQuest app, or by calling the customer service number at (866) 697-8378. Walk-ins are also accepted at many locations, but appointments are recommended.
Use the "Find a Location" feature on the Quest Diagnostics website to search for a location by entering your city, state, or ZIP code.
Bring a valid photo ID, your insurance card, the test order from your doctor (if not sent to Quest by the doctor's office), and any other specific instructions from your healthcare provider.
Test results can be accessed online through the MyQuest portal or app. You can also request to have your results mailed to you or sent directly to your healthcare provider.
The time it takes to receive test results can vary depending on the test. Some results are available within 24 hours, while others may take several days. Check with the Quest Diagnostics representative or your healthcare provider for specific timelines.
Contact your healthcare provider for interpretation and guidance. Quest Diagnostics customer service can provide general information but cannot offer medical advice.
Pay your bill online through the Quest Diagnostics website or MyQuest portal, by phone, or by mailing a check to the address provided on your bill.
Quest Diagnostics accepts a wide range of insurance plans. Check the website for a list of accepted insurance providers or contact customer service for specific inquiries.
Log into your MyQuest account, contact customer service, or provide the updated information at the time of your appointment.
Contact Quest Diagnostics billing customer service at (866) 697-8378.

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