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Upcoming holiday closures 

Quest Patient Service Centers will be closed on Friday, July 3 and Saturday, July 4, 2026, in observance of Independence Day, and to give our frontline team the time to recharge. Don't let the holiday interrupt your care. Plan your visit today.

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Customer Service

Contact Customer Service

Email or call us with questions or comments based on your area of interest below.

Call us:

866-MYQUEST (866-697-8378)

Email us:

Billing

Locations/Appointments

Patient Service Centers

Call us:

866-MYQUEST (866-697-8378)

Email us:

Billing

Locations/Appointments

Patient Service Centers

 

Call us:

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

Call us:

1 (866) GENE-INFO

Call us:

1 (800) 890-6220

Call us:

1 (800) 890-6220

Call us:

1 (866) 358-9828, option 1

Call us:

1 (800) 891-2917

Call us:

1 (877) 933-9261

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