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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 - Employer Drug Screens Not Offered - Los Banos West I Street

730 W I St,

Los Banos, CA 93635

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11.07 mi away

Schedule Appointment 209-827-3628
Monday: 6:30 am-3:00 pm
Tuesday: 6:30 am-3:00 pm
Wednesday: 6:30 am-3:00 pm
Thursday: 6:30 am-3:00 pm
Friday: 6:30 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Patterson Sperry

1045 Sperry Ave,

Ste D

Patterson, CA 95363

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20.66 mi away

Schedule Appointment 209-202-9293
Monday: 7:00 am-3:30 pm
Tuesday: 7:00 am-3:30 pm
Wednesday: 7:00 am-3:30 pm
Thursday: 7:00 am-3:30 pm
Friday: 7:00 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Employer Drug Screens Not Offered - Atwater Commerce Ave

1271 Commerce Ave,

Shops 5

Atwater, CA 95301

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22.33 mi away

Schedule Appointment 209-628-7860
Monday: 7:00 am-3:30 pm
Tuesday: 7:00 am-3:30 pm
Wednesday: 7:00 am-3:30 pm
Thursday: 7:00 am-3:30 pm
Friday: 7:00 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Turlock East Hawkeye Avenue

777 E Hawkeye Ave,

Ste 1

Turlock, CA 95380

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23.14 mi away

Schedule Appointment 209-202-9175
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Turlock East Tuolumne - Employer Drug Testing Not Offered

981 East Tuolumne Road,

Suite 100

Turlock, CA 95382

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23.7 mi away

Schedule Appointment 209-202-9569
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: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Merced West Childs Avenue - Employer Drug Testing Not Offered

857 W Childs Ave,

Merced, CA 95341

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26.72 mi away

Schedule Appointment 209-725-0658
Monday: 7:30 am-4:00 pm
Tuesday: 7:30 am-4:00 pm
Wednesday: 7:30 am-4:00 pm
Thursday: 7:30 am-4:00 pm
Friday: 7:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Merced East 13th - Employer Drug Testing Not Offered

240 East 13th Street,

Suite A

Merced, CA 95340

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27.98 mi away

Schedule Appointment 209-383-3531
Monday: 7:00 am-3:30 pm
Tuesday: 7:00 am-3:30 pm
Wednesday: 7:00 am-3:30 pm
Thursday: 7:00 am-3:30 pm
Friday: 7:00 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Ceres East Whitmore Avenue

2531 E Whitmore Ave,

Ste P

Ceres, CA 95307

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28.06 mi away

Schedule Appointment 209-581-0155
Monday: 6:00 am-3:00 pm
Tuesday: 6:00 am-3:00 pm
Wednesday: 6:00 am-3:00 pm
Thursday: 6:00 am-3:00 pm
Friday: 6:00 am-3:00 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Merced G Street - Employer Drug Testing Not Offered

3377 G Street,

Ste A

Merced, CA 95340

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28.86 mi away

Schedule Appointment 209-388-1046
Monday: 5:30 am-4:30 pm
Tuesday: 5:30 am-4:30 pm
Wednesday: 5:30 am-4:30 pm
Thursday: 5:30 am-4:30 pm
Friday: 5:30 am-4:30 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Modesto 6th Street

1008 6th Street,

Suite C

Modesto, CA 95354

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30.85 mi away

Schedule Appointment 209-569-0379
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: Closed
Sunday: Closed
Quest Diagnostics - Inside Hollister Safeway Store - Employer Drug Testing Not Offered

591 Tres Pinos Rd,

Hollister, CA 95023

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32.56 mi away

Schedule Appointment 831-902-2070
Monday: 7:30 am-11:30 am , 12:30 pm-4:30 pm
Tuesday: 7:30 am-11:30 am , 12:30 pm-4:30 pm
Wednesday: 7:30 am-11:30 am , 12:30 pm-4:30 pm
Thursday: 7:30 am-11:30 am , 12:30 pm-4:30 pm
Friday: 7:30 am-11:30 am , 12:30 pm-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Modesto E Orangeburg Ave

2222 E Orangeburg Ave,

Suite 104

Modesto, CA 95355

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32.61 mi away

Schedule Appointment 888-277-8772
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Modesto McHenry Avenue - Employer Drug Testing Not Offered

1524 Mchenry Ave,

Ste 120

Modesto, CA 95350

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32.74 mi away

Schedule Appointment 209-575-4559
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: 6:30 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Gilroy No Name Uno- Employer Drug Testing Not Offered

9360 No Name Uno,

Ste 220

Gilroy, CA 95020

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32.78 mi away

Schedule Appointment 408-337-3231
Monday: 7:30 am-4:00 pm
Tuesday: 7:30 am-4:00 pm
Wednesday: 7:30 am-4:00 pm
Thursday: 7:30 am-4:00 pm
Friday: 7:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Gilroy Wren Avenue - Employer Drug Testing Not Offered

7880 Wren Avenue,

Suite A114

Gilroy, CA 95020

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34.2 mi away

Schedule Appointment 408-201-3232
Monday: 7:00 am-1:30 pm
Tuesday: 7:00 am-1:30 pm
Wednesday: 7:00 am-1:30 pm
Thursday: 7:00 am-1:30 pm
Friday: 7:00 am-1:30 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Modesto Pelandale Ave

3525 Pelandale Ave,

Modesto, CA 95356

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35.37 mi away

Schedule Appointment 209-222-1754
Monday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Tuesday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Wednesday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Thursday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Friday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Employer Drug Testing Not Offered - Morgan Hill East Main Street

50 East Main Avenue,

Suite B

Morgan Hill, CA 95037

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35.64 mi away

Schedule Appointment 408-201-3251
Monday: 7:00 am-3:00 pm
Tuesday: 7:00 am-3:00 pm
Wednesday: 7:00 am-3:00 pm
Thursday: 7:00 am-3:00 pm
Friday: 7:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Chowchilla Trinity Avenue - Employer Drug Testing Not Offered

341 Trinity Ave,

Chowchilla, CA 93610

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38.75 mi away

Schedule Appointment 559-665-7286
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 - Oakdale South Oak Avenue

250 S. Oak Ave,

Bldg C, Ste 2

Oakdale, CA 95361

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39.73 mi away

Schedule Appointment 209-845-2911
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Manteca Norman Drive - Employer Drug Testing Not Offered

1140 Norman Dr,

Ste 2

Manteca, CA 95336

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43.12 mi away

Schedule Appointment 209-825-4158
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Manteca East Commerce Avenue

293 East Commerce Ave,

Manteca, CA 95336

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43.15 mi away

Schedule Appointment 209-823-2560
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: 6:30 am-10:30 am
Sunday: Closed
Quest Diagnostics - San Jose Quimby Road - Employer Drug Testing Not Offered

2365 Quimby Rd,

Ste 211

San Jose, CA 95122

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44.61 mi away

Schedule Appointment 408-274-2670
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: Closed
Sunday: Closed
Quest Diagnostics - Tracy 1832 W 11th St

1832 W 11Th St,

Tracy, CA 95376

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45.07 mi away

Schedule Appointment 209-830-1350
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: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Freedom Green Valley Rd

202 Green Valley Rd,

Ste A

Freedom, CA 95019

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45.16 mi away

Schedule Appointment 831-728-0808
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - San Jose Camden Avenue - Employer Drug Testing Not Offered

6475 Camden Avenue,

Suite 104

San Jose, CA 95120

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46.61 mi away

Schedule Appointment 408-335-9650
Monday: 7:00 am-3:00 pm
Tuesday: 7:00 am-3:00 pm
Wednesday: 7:00 am-3:00 pm
Thursday: 7:00 am-3:00 pm
Friday: 7:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - San Jose Alum Rock Avenue

2618 Alum Rock Ave,

San Jose, CA 95116

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46.63 mi away

Schedule Appointment 408-202-6029
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-10:00 am
Sunday: Closed
Quest Diagnostics - Salinas Alvin Drive

631 E Alvin Dr,

Ste G1

Salinas, CA 93906

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48.01 mi away

Schedule Appointment 831-751-2280
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: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - San Jose Willow Street

840 Willow St,

Ste 700

San Jose, CA 95125

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48.91 mi away

Schedule Appointment 408-314-4861
Monday: 7:00 am-3:00 pm
Tuesday: 7:00 am-3:00 pm
Wednesday: 7:00 am-3:00 pm
Thursday: 7:00 am-3:00 pm
Friday: 7:00 am-3:00 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.