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Quest Diagnostics

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Lab testing, laboratory and office locations around the world

Quest Diagnostics has headquarters in the U.S. and operations in India, Ireland, and Mexico. Our products and services are used by customers in over 130 countries. We also collaborate with many international diagnostic laboratories, hospitals and clinics to help improve human health around the world.

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Quest Diagnostics - Greenwich- Employer Drug Testing Not Offered

405 E Putnam Ave,

Greenwich, CT 06830

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4.64 mi away

Schedule Appointment 203-561-8506
Monday: 6:30 am-12:00 pm , 1:00 pm-4:00 pm
Tuesday: 6:30 am-12:00 pm , 1:00 pm-4:00 pm
Wednesday: 6:30 am-12:00 pm , 1:00 pm-4:00 pm
Thursday: 6:30 am-12:00 pm , 1:00 pm-4:00 pm
Friday: 6:30 am-12:00 pm , 1:00 pm-4:00 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - White Plains

280 Dobbs Ferry Rd,

Sprain Brook Medical Center

White Plains, NY 10607

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7.27 mi away

Schedule Appointment 914-946-6271
Monday: 8:00 am-4:00 pm
Tuesday: 8:00 am-4:00 pm
Wednesday: 8:00 am-12:00 pm
Thursday: 8:00 am-4:00 pm
Friday: 8:00 am-4:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Scarsdale

721 White Plains Rd,

Scarsdale, NY 10583

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7.49 mi away

Schedule Appointment 914-571-1919
Monday: 8:00 am-4:00 pm
Tuesday: 8:00 am-4:00 pm
Wednesday: 8:00 am-4:00 pm
Thursday: 8:00 am-4:00 pm
Friday: 8:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Stamford Summer St

1250 Summer St,

Ste 203

Stamford, CT 06905

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7.84 mi away

Schedule Appointment 475-619-3857
Monday: 6:00 am-5:00 pm
Tuesday: 6:00 am-5:00 pm
Wednesday: 6:00 am-5:00 pm
Thursday: 6:00 am-5:00 pm
Friday: 6:00 am-5:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - New Rochelle

150 Lockwood Ave,

Ste 38

New Rochelle, NY 10801

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9.25 mi away

Schedule Appointment 914-235-2400
Monday: 8:00 am-4:00 pm
Tuesday: 8:00 am-4:00 pm
Wednesday: 8:00 am-4:00 pm
Thursday: 8:00 am-4:00 pm
Friday: 8:00 am-4:00 pm
Saturday: Closed
Sunday: Closed

Our focus on your safety

Our safety precautions help ensure your confidence and comfort while visiting our Patient Service Centers to get the testing you need, today and every day.

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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. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.