Quest Diagnostics Customer Service Contacts

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

How to reach a person at Quest Diagnostics

Customer Service: 1-866-697-8378

Quest Diagnostics Responsiveness rating


The Elliott Responsiveness Rating scores companies based on how responsive they are to customers. Here's more information about our ratings.

What you need to know about Quest Diagnostics

The biggest problem customers have with Quest (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.

How to resolve a problem with Quest Diagnostics

The executive contacts we’ve researched are fairly responsive. If they aren’t, please let us know.

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

Quest Diagnostics’s mailing address

500 Plaza Drive
Secaucus, NJ 07094

Customer service resources

Quest Diagnostics’s social media channels


Quest Diagnostics’s executive customer service contacts

Primary Contact
Matthew March
Quest Experience Support Senior Manager
500 Plaza Drive
Secaucus, NJ 07094
[email protected]

Chief Executive
James Davis
President and Chief Executive Officer
500 Plaza Drive
Secaucus, NJ 07094
[email protected]

How to get professional help with your Quest Diagnostics problem

If you need help with Quest Diagnostics, you can contact our advocacy team or just click the "Get Help" button. For immediate assistance, you can also send us a message on our Facebook group. Note: We do not charge for our advocacy.

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