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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 - Inside Richmond Walmart Store

5330 Fm 1640 Rd,

Richmond, TX 77469

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1.05 mi away

Schedule Appointment 281-344-2107
Monday: 7:00 am-12:00 pm , 12:30 pm-4:00 pm
Tuesday: 7:00 am-12:00 pm , 12:30 pm-4:00 pm
Wednesday: 7:00 am-12:00 pm , 12:30 pm-4:00 pm
Thursday: 7:00 am-12:00 pm , 12:30 pm-4:00 pm
Friday: 7:00 am-12:00 pm , 12:30 pm-4:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Richmond PSC

1601 Main Street,

Suite 208

Richmond, TX 77469

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2.15 mi away

Schedule Appointment 281-342-5069
Monday: 7:30 am-11:30 am , 12:00 pm-4:30 pm
Tuesday: 7:30 am-11:30 am , 12:00 pm-4:30 pm
Wednesday: 7:30 am-11:30 am , 12:00 pm-4:30 pm
Thursday: 7:30 am-11:30 am , 12:00 pm-4:30 pm
Friday: 7:30 am-11:30 am , 12:00 pm-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - 17520 West Grand Pkwy MH

17520 W Grand Pkwy S,

Ste 240

Sugar Land, TX 77479

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2.61 mi away

Schedule Appointment 346-274-3867
Monday: 7:30 am-5:00 pm
Tuesday: 7:30 am-5:00 pm
Wednesday: 7:30 am-5:00 pm
Thursday: 7:30 am-5:00 pm
Friday: 7:30 am-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - 17510 West Grand Pkwy MH

17510 W Grand Pkwy S,

Ste 390

Sugar Land, TX 77479

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2.65 mi away

Schedule Appointment 979-253-4098
Monday: 7:30 am-5:30 pm
Tuesday: 7:30 am-5:30 pm
Wednesday: 7:30 am-5:30 pm
Thursday: 7:30 am-5:30 pm
Friday: 7:30 am-5:30 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Sugarland

15259 Southwest Freeway,

Sugar Land, TX 77478

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7.55 mi away

Schedule Appointment 281-494-4553
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: 8:00 am-12:00 pm
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.