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Quest Diagnostics

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Call us

Client services: 1.866.MY.QUEST (1.866.697.8378)

We’re here to answer your questions including clinical drug monitoring, urine drug testing, toxicology, and results interpretation. Please do not include any specific patient name or test order information in this form. Please remember that email, including this web form, is not a secure method of communication. Do not submit personal information, including user names and passwords, social security numbers, or personal health information through this form.

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Drug toxicology consultation for healthcare providers

For assistance with prescription drug monitoring results, please contact Quest Diagnostics toxicology consultant specialists. They are available Monday – Friday, 8:00 AM to 10:00 PM Eastern Time.

 

1.877.40.RXTOX (1.877.407.9869)

Our company

Quest® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA-certified laboratories that provide HIPAA-covered services.  Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA-covered services. 

 

Quest®, Quest Diagnostics®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—® and ™—are the property of their respective owners. © 2026 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.