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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 - 300 Niagara St

300 Niagara St,

Patient Service Center

Buffalo, NY 14201

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0.36 mi away

Schedule Appointment 716-339-4250
Monday: 8:00 am-12:00 pm , 12:30 pm-4:00 pm
Tuesday: 8:00 am-12:00 pm , 12:30 pm-4:00 pm
Wednesday: 8:00 am-12:00 pm , 12:30 pm-4:00 pm
Thursday: 8:00 am-12:00 pm , 12:30 pm-4:00 pm
Friday: 8:00 am-12:00 pm , 12:30 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - 455 Delaware

455 Delaware Ave,

Buffalo, NY 14202

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0.7 mi away

Schedule Appointment 716-855-2131
Monday: 6:30 am-2:30 pm
Tuesday: 6:30 am-2:30 pm
Wednesday: 6:30 am-2:30 pm
Thursday: 6:30 am-2:30 pm
Friday: 6:30 am-2:30 pm
Saturday: 6:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Jefferson

1317 Jefferson Ave,

Buffalo, NY 14208

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2.15 mi away

Schedule Appointment 716-882-3020
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 - Lawn Avenue

155 Lawn Ave,

Buffalo, NY 14207

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4.35 mi away

Schedule Appointment 716-877-1113
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 - Delaware Place Plaza

2629 Delaware Ave,

Delaware Place Plaza

Buffalo, NY 14216

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4.72 mi away

Schedule Appointment 716-874-1703
Monday: 5:00 am-1:00 pm
Tuesday: 5:00 am-1:00 pm
Wednesday: 5:00 am-1:00 pm
Thursday: 5:00 am-1:00 pm
Friday: 5:00 am-1:00 pm
Saturday: 6:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Walden Avenue

1779 Walden Ave,

Ste 300

Cheektowaga, NY 14225

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5.99 mi away

Schedule Appointment 716-894-1575
Monday: 5:30 am-1:30 pm
Tuesday: 5:30 am-1:30 pm
Wednesday: 5:30 am-1:30 pm
Thursday: 5:30 am-1:30 pm
Friday: 5:30 am-1:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - West Seneca

264 Center Rd,

West Seneca, NY 14224

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6.6 mi away

Schedule Appointment 716-677-6255
Monday: 5:30 am-2:00 pm
Tuesday: 5:30 am-2:00 pm
Wednesday: 5:30 am-2:00 pm
Thursday: 5:30 am-2:00 pm
Friday: 5:30 am-2:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - 3842 Harlem

3842 Harlem Rd,

Cheektowaga, NY 14215

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6.6 mi away

Schedule Appointment 716-835-9522
Monday: 6:30 am-4:00 pm
Tuesday: 6:30 am-4:00 pm
Wednesday: 6:30 am-4:00 pm
Thursday: 6:30 am-4:00 pm
Friday: 6:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Blasdell

4233 Lake Ave,

Ste 2

Blasdell, NY 14219

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6.95 mi away

Schedule Appointment 716-822-1122
Monday: 8:30 am-4:00 pm
Tuesday: 8:30 am-4:00 pm
Wednesday: 8:30 am-4:00 pm
Thursday: 8:30 am-4:00 pm
Friday: 8:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Tonawanda

4041 Delaware Ave,

Ste 110

Tonawanda, NY 14150

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7.38 mi away

Schedule Appointment 716-877-5040
Monday: 6:00 am-4:00 pm
Tuesday: 6:00 am-4:00 pm
Wednesday: 6:00 am-4:00 pm
Thursday: 6:00 am-4:00 pm
Friday: 6:00 am-4:00 pm
Saturday: 6:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - 3620 Sheridan Drive

3620 Sheridan Dr,

Ste 100

Amherst, NY 14226

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7.66 mi away

Schedule Appointment 716-833-1363
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: 6:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - West Seneca

1106 Union Rd,

Southgate Plaza

West Seneca, NY 14224

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7.82 mi away

Schedule Appointment 716-675-1505
Monday: 8:00 am-6:00 pm
Tuesday: 8:00 am-6:00 pm
Wednesday: 8:00 am-6:00 pm
Thursday: 8:00 am-6:00 pm
Friday: 8:00 am-6:00 pm
Saturday: 6:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - 3041 Orchard Park

3041 Orchard Park Rd,

Orchard Park, NY 14127

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8.91 mi away

Schedule Appointment 716-677-9996
Monday: 5:00 am-3:00 pm
Tuesday: 5:00 am-3:00 pm
Wednesday: 5:00 am-3:00 pm
Thursday: 5:00 am-3:00 pm
Friday: 5:00 am-3:00 pm
Saturday: 6:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Grand Island

1738 Grand Island Blvd,

Grand Island, NY 14072

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9.17 mi away

Schedule Appointment 716-773-3040
Monday: 6:00 am-2:00 pm
Tuesday: 6:00 am-2:00 pm
Wednesday: 6:00 am-2:00 pm
Thursday: 6:00 am-2:00 pm
Friday: 6:00 am-2:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Depew

5340 Transit Rd,

Depew, NY 14043

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9.75 mi away

Schedule Appointment 716-681-5517
Monday: 6:00 am-4:00 pm
Tuesday: 6:00 am-4:00 pm
Wednesday: 6:00 am-4:00 pm
Thursday: 6:00 am-4:00 pm
Friday: 6:00 am-4:00 pm
Saturday: 6:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Lancaster

4845 Transit Rd,

Lancaster, NY 14043

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9.82 mi away

Schedule Appointment 716-656-0385
Monday: 5:00 am-1:30 pm
Tuesday: 5:00 am-1:30 pm
Wednesday: 5:00 am-1:30 pm
Thursday: 5:00 am-1:30 pm
Friday: 5:00 am-1:30 pm
Saturday: Closed
Sunday: Closed

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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.