Quest Diagnostics is a pathology and laboratory services company formed in 1967. Quest Diagnostics is commonly used with a service agreement with most hospitals and medical clinics. Quest Diagnostics customer support is offered in the form of email or phone support.
Phone: 866-697-8378
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How to reach a live person:
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Hours of Operation:
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Email:
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- Customer service link:
- Main Company URL:
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Description:
- The number above services most locations, but click the customer service link for the number in your area.