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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 - Apple Valley Corwin Road - Employer Drug Testing Not Offered

18523 Corwin Rd,

Ste P

Apple Valley, CA 92307

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17.29 mi away

Schedule Appointment 442-242-4518
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 - Victorville Hesperia Road - Employer Drug Testing Not Offered

12370 Hesperia Rd,

Ste 4

Victorville, CA 92395

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18.73 mi away

Schedule Appointment 442-242-4672
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-11:00 am
Sunday: Closed
Quest Diagnostics - Hesperia 14101 Main St

14101 Main St,

Ste 102

Hesperia, CA 92345

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19.46 mi away

Schedule Appointment 442-267-7557
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 - Barstow Mountain View Street

309 E Mountain View St,

Ste 112

Barstow, CA 92311

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31.38 mi away

Schedule Appointment 442-235-1629
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 - Palmdale 11th Street West - Employer Drug Testing Not Offered

41230 11Th St W,

Ste D

Palmdale, CA 93551

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32.47 mi away

Schedule Appointment 661-206-3007
Monday: 8:00 am-12:00 pm , 1:00 pm-5:00 pm
Tuesday: 8:00 am-12:00 pm , 1:00 pm-5:00 pm
Wednesday: 8:00 am-12:00 pm , 1:00 pm-5:00 pm
Thursday: 8:00 am-12:00 pm , 1:00 pm-5:00 pm
Friday: 8:00 am-12:00 pm , 1:00 pm-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Palmdale Auto Center Drive - Employer Drug Testing Not Offered

843 Auto Center Dr,

Ste A

Palmdale, CA 93551

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32.6 mi away

Schedule Appointment 661-274-4358
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 - Lancaster West Avenue J - Employer Drug Testing Not Offered

1629 W Avenue J,

Ste 102

Lancaster, CA 93534

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32.91 mi away

Schedule Appointment 661-942-5871
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: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Rancho Cucamonga Lemon - Employer Drug Testing Not Offered

10399 Lemon Ave,

Ste 104

Rancho Cucamonga, CA 91737

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36.74 mi away

Schedule Appointment 909-466-1964
Monday: 5:00 am-5:00 pm
Tuesday: 5:00 am-5:00 pm
Wednesday: 5:00 am-5:00 pm
Thursday: 5:00 am-5:00 pm
Friday: 5:00 am-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Fontana Sierra Lakes Parkway - Employer Drug Testing Not Offered

17051 Sierra Lakes Pkwy,

Ste 205

Fontana, CA 92336

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37.24 mi away

Schedule Appointment 909-202-9122
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: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Upland Foothill

1399 E Foothill Blvd,

Ste B

Upland, CA 91786

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39.12 mi away

Schedule Appointment 909-946-9405
Monday: 5:00 am-4:00 pm
Tuesday: 5:00 am-4:00 pm
Wednesday: 5:00 am-4:00 pm
Thursday: 5:00 am-4:00 pm
Friday: 5:00 am-4:00 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Employer Drug Screens Not Offered - Quest Diagnostics - San Bernardino Waterman Avenue

2150 N Waterman Ave,

Ste 100b

San Bernardino, CA 92404

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39.48 mi away

Schedule Appointment 909-361-7543
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - San Bernardino N Waterman Ave

1700 N Waterman Ave,

San Bernardino, CA 92404

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39.75 mi away

Schedule Appointment 909-453-5314
Monday: 7:00 am-5:00 pm
Tuesday: 7:00 am-5:00 pm
Wednesday: 7:00 am-5:00 pm
Thursday: 7:00 am-5:00 pm
Friday: 7:00 am-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Upland Mountain - Employer Drug Testing Not Offered

573 N Mountain Ave,

Upland, CA 91786

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39.94 mi away

Schedule Appointment 909-981-5941
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 - Glendora South Grand Avenue - Employer Drug Testing Not Offered

210 S Grand Ave,

Ste 124

Glendora, CA 91741

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41.05 mi away

Schedule Appointment 626-250-1614
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Pomona Bonita Avenue - Employer Drug Testing Not Offered

250 W Bonita Ave Bldg A ,,

Ste 130

Pomona, CA 91767

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41.24 mi away

Schedule Appointment 909-455-8253
Monday: 6:00 am-3:30 pm
Tuesday: 6:00 am-3:30 pm
Wednesday: 6:00 am-3:30 pm
Thursday: 6:00 am-3:30 pm
Friday: 6:00 am-3:30 pm
Saturday: 6:30 am-11:30 am
Sunday: Closed
Quest Diagnostics - San Dimas West Covina Boulevard - Employer Drug Testing Not Offered

1330 W Covina Blvd,

Ste 205

San Dimas, CA 91773

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42.49 mi away

Schedule Appointment 626-201-1152
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 - Colton Vernon Ave

1057 N Mount Vernon Ave,

Colton, CA 92324

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42.78 mi away

Schedule Appointment 909-953-4330
Monday: 7:30 am-12:00 pm , 1:00 pm-4:30 pm
Tuesday: 7:30 am-12:00 pm , 1:00 pm-4:30 pm
Wednesday: 7:30 am-12:00 pm , 1:00 pm-4:30 pm
Thursday: 7:30 am-12:00 pm , 1:00 pm-4:30 pm
Friday: 7:30 am-12:00 pm , 1:00 pm-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Covina East San Bernardino Road

554 E San Bernardino Rd,

Ste 103

Covina, CA 91723

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43.93 mi away

Schedule Appointment 626-430-8943
Monday: 7:30 am-3:00 pm
Tuesday: 7:30 am-3:00 pm
Wednesday: 7:30 am-3:00 pm
Thursday: 7:30 am-3:00 pm
Friday: 7:30 am-3:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Chino Philadelphia St

5562 Philadelphia St,

Ste 206

Chino, CA 91710

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44.58 mi away

Schedule Appointment 909-203-2625
Monday: 7:00 am-1:00 pm
Tuesday: 7:00 am-1:00 pm
Wednesday: 7:00 am-1:00 pm
Thursday: 7:00 am-1:00 pm
Friday: 7:00 am-1:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Big Bear Lake Fox Farm Rd

42002 Fox Farm Rd,

Ste 103

Big Bear Lake, CA 92315

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45.22 mi away

Schedule Appointment 909-936-8426
Monday: 7:00 am-11:30 am , 12:30 pm-3:00 pm
Tuesday: 7:00 am-11:30 am , 12:30 pm-3:00 pm
Wednesday: 7:00 am-11:30 am , 12:30 pm-3:00 pm
Thursday: 7:00 am-11:30 am , 12:30 pm-3:00 pm
Friday: 7:00 am-11:30 am , 12:30 pm-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Arcadia West Huntington - Employer Drug Testing Not Offered

301 W Huntington Dr,

Ste 413

Arcadia, CA 91007

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45.62 mi away

Schedule Appointment 626-238-2709
Monday: 7:30 am-12:00 pm , 1:00 pm-4:00 pm
Tuesday: 7:30 am-12:00 pm , 1:00 pm-4:00 pm
Wednesday: 7:30 am-12:00 pm , 1:00 pm-4:00 pm
Thursday: 7:30 am-12:00 pm , 1:00 pm-4:00 pm
Friday: 7:30 am-12:00 pm , 1:00 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Loma Linda Barton Road - Employer Drug Testing Not Offered

25805 Barton Rd,

Ste A-104

Loma Linda, CA 92354

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45.82 mi away

Schedule Appointment 909-222-7698
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 - Diamond Bar North Diamond Bar - Employer Drug Testing Not Offered

750 N Diamond Bar Blvd,

Ste 110

Diamond Bar, CA 91765

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46.26 mi away

Schedule Appointment 909-282-6817
Monday: 7:00 am-12:00 pm
Tuesday: 7:00 am-12:00 pm
Wednesday: 7:00 am-12:00 pm
Thursday: 7:00 am-12:00 pm
Friday: 7:00 am-12:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Arcadia West Duarte - Employer Drug Testing Not Offered

612 W Duarte Rd,

Ste 104

Arcadia, CA 91007

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46.39 mi away

Schedule Appointment 626-684-0102
Monday: 6:30 am-5:00 pm
Tuesday: 6:30 am-5:00 pm
Wednesday: 6:30 am-5:00 pm
Thursday: 6:30 am-5:00 pm
Friday: 6:30 am-5:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - West Covina-California Ave

553 S California Ave,

Ste A

West Covina, CA 91790

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46.56 mi away

Schedule Appointment 626-404-7660
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 - Redlands Terracina Boulevard - Employer Drug Testing Not Offered

245 Terracina Blvd,

Ste 104B

Redlands, CA 92373

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47.03 mi away

Schedule Appointment 909-798-5846
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 - Chino Grand Ave

4028 Grand Ave,

Ste B

Chino, CA 91710

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47.26 mi away

Schedule Appointment 909-548-3485
Monday: 6:30 am-4:30 pm
Tuesday: 6:30 am-4:30 pm
Wednesday: 6:30 am-4:30 pm
Thursday: 6:30 am-4:30 pm
Friday: 6:30 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Pasadena East Green

960 E Green St,

Ste 164

Pasadena, CA 91106

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47.96 mi away

Schedule Appointment 626-240-8923
Monday: 8:00 am-12:30 pm , 1:30 pm-4:00 pm
Tuesday: 8:00 am-12:30 pm , 1:30 pm-4:00 pm
Wednesday: 8:00 am-12:30 pm , 1:30 pm-4:00 pm
Thursday: 8:00 am-12:30 pm , 1:30 pm-4:00 pm
Friday: 8:00 am-12:30 pm , 1:30 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Eastvale Orbis- Employer Drug Testing Not Offered

6102 Orbis Way,

Ste 510

Eastvale, CA 92880

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47.98 mi away

Schedule Appointment 951-332-3265
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 - Pasadena North Madison - Employer Drug Testing Not Offered

65 N Madison Ave,

Ste 305

Pasadena, CA 91101

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48.13 mi away

Schedule Appointment 626-243-8764
Monday: 8:00 am-12:30 pm , 1:30 pm-4:00 pm
Tuesday: 8:00 am-12:30 pm , 1:30 pm-4:00 pm
Wednesday: 8:00 am-12:30 pm , 1:30 pm-4:00 pm
Thursday: 8:00 am-12:30 pm , 1:30 pm-4:00 pm
Friday: 8:00 am-12:30 pm , 1:30 pm-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Glendale North Verdugo - Employer Drug Testing Not Offered

3600 N Verdugo Rd,

Suite 303

Glendale, CA 91208

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48.6 mi away

Schedule Appointment 747-257-4962
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 - Riverside 4646 Brockton

4646 Brockton Ave,

Ste 102

Riverside, CA 92506

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48.67 mi away

Schedule Appointment 951-784-7656
Monday: 7:00 am-4:30 pm
Tuesday: 7:00 am-4:30 pm
Wednesday: 7:00 am-4:30 pm
Thursday: 7:00 am-4:30 pm
Friday: 7:00 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - San Gabriel West Las Tunas- Employer Drug Testing Not Offered

416 W LasTunas Dr,

Ste 204

San Gabriel, CA 91776

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49.39 mi away

Schedule Appointment 626-238-5666
Monday: 7:30 am-12:00 pm
Tuesday: 7:30 am-12:00 pm
Wednesday: 7:30 am-12:00 pm
Thursday: 7:30 am-12:00 pm
Friday: 7:30 am-12:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Pasadena Bellefontaine - Employer Drug Testing Not Offered

50 Bellefontaine St,

Ste 101

Pasadena, CA 91105

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49.41 mi away

Schedule Appointment 323-376-6039
Monday: 6:30 am-5:00 pm
Tuesday: 6:30 am-5:00 pm
Wednesday: 6:30 am-5:00 pm
Thursday: 6:30 am-5:00 pm
Friday: 6:30 am-5:00 pm
Saturday: 7:30 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Inside Santa Clarita Vons Store - Employer Drug Testing Not Offered

16550 Soledad Canyon Rd,

Santa Clarita, CA 91387

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49.94 mi away

Schedule Appointment 661-309-1226
Monday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Tuesday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Wednesday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Thursday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Friday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Saturday: Closed
Sunday: Closed

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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.