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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 - La Mesa Fletcher Pkwy

8881 Fletcher Pkwy,

Ste 305

La Mesa, CA 91942

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0.92 mi away

Schedule Appointment 619-589-9211
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 - Santee Mission Gorge

9665 Mission Gorge Rd,

Ste B2

Santee, CA 92071

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4.54 mi away

Schedule Appointment 442-225-2784
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 - El Cajon Jamacha Road - Employer Drug Testing Not Offered

860 Jamacha Rd,

Ste 103

El Cajon, CA 92019

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5.03 mi away

Schedule Appointment 619-219-9080
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 - National City East 8th Street - Employer Drug Testing Not Offered

2340 E 8th St,

Ste F

National City, CA 91950

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7.33 mi away

Schedule Appointment 619-479-8463
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 - SAN DIEGO FOURTH AVE - Employer Drug Testing Not Offered

4060 4th Ave,

Ste 125

San Diego, CA 92103

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7.59 mi away

Schedule Appointment 619-291-4890
Monday: 8:00 am-5:00 pm
Tuesday: 8:00 am-5:00 pm
Wednesday: 8:00 am-5:00 pm
Thursday: 8:00 am-5:00 pm
Friday: 8:00 am-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - SAN DIEGO-FIRST AVE- Employer Drug Testing Not Offered

1855 1st Ave,

Ste 200-B

San Diego, CA 92101

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8.31 mi away

Schedule Appointment 619-236-0081
Monday: 9:00 am-1:00 pm , 1:30 pm-3:00 pm
Tuesday: 9:00 am-1:00 pm , 1:30 pm-2:30 pm
Wednesday: 9:00 am-1:00 pm , 1:30 pm-2:30 pm
Thursday: 9:00 am-1:00 pm , 1:30 pm-2:30 pm
Friday: 9:00 am-1:00 pm , 1:30 pm-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Chula Vista 4th Avenue - Employer Drug Testing Not Offered

480 Fourth Ave,

Ste 101

Chula Vista, CA 91910

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10.44 mi away

Schedule Appointment 619-425-4833
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: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Chula Vista Telegraph Canyon - Employer Drug Testing Not Offered

563 Telegraph Canyon Rd,

Chula Vista, CA 91910

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10.48 mi away

Schedule Appointment 619-397-0294
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 - San Diego Genesee - Employer Drug Testing Not Offered

9333 Genesee Ave,

Ste 180

San Diego, CA 92121

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12.14 mi away

Schedule Appointment 858-587-2702
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 - Poway Pomerado - Employer Drug Testing Not Offered

15725 Pomerado Rd,

Ste 208

Poway, CA 92064

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15.48 mi away

Schedule Appointment 619-318-3589
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 - Encinitas El Camino Real - Employer Drug Testing Not Offered

477 N El Camino Real,

Ste B201

Encinitas, CA 92024

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23.06 mi away

Schedule Appointment 760-753-0281
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 - Escondido Valley Parkway

488 E Valley Pkwy,

Suite 314

Escondido, CA 92025

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24.19 mi away

Schedule Appointment 760-317-8980
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 - Vista Sycamore - Employer Drug Testing Not Offered

902 Sycamore Ave,

Ste 201

Vista, CA 92081

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28.42 mi away

Schedule Appointment 442-204-2565
Monday: 7:00 am-11:30 am
Tuesday: 7:00 am-11:30 am
Wednesday: 7:00 am-11:30 am
Thursday: 7:00 am-11:30 am
Friday: 7:00 am-11:30 am
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Oceanside Vista - Employer Drug Testing Not Offered

3601 Vista Way,

Ste 104

Oceanside, CA 92056

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31.79 mi away

Schedule Appointment 760-722-7148
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 - Fallbrook East Elder Street - Employer Drug Testing Not Offered

521 E Elder St,

Ste 201

Fallbrook, CA 92028

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43.22 mi away

Schedule Appointment 442-245-0985
Monday: 7:00 am-2:30 pm
Tuesday: 7:00 am-2:30 pm
Wednesday: 7:00 am-2:30 pm
Thursday: 7:00 am-2:30 pm
Friday: 7:00 am-2:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Temecula Parkway - Employer Drug Testing Not Offered

31150 Temecula Pkwy,

Ste 203

Temecula, CA 92592

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48.54 mi away

Schedule Appointment 951-719-1140
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 - Temecula Single Oak- Employer Drug Testing Not Offered

28780 Single Oak Dr,

Ste 275

Temecula, CA 92590

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50.38 mi away

Schedule Appointment 951-297-8829
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 - Temecula Jefferson - Employer Drug Testing Not Offered

27699 Jefferson Ave,

Ste 109

Temecula, CA 92590

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51.39 mi away

Schedule Appointment 951-225-2474
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: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Murrieta Medical Center - Employer Drug Testing Not Offered

25460 Medical Center Dr,

Ste 102

Murrieta, CA 92562

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54.55 mi away

Schedule Appointment 951-414-5642
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 - Murrieta Hancock - Employer Drug Testing Not Offered

25405 Hancock Ave,

Ste 102

Murrieta, CA 92562

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54.57 mi away

Schedule Appointment 951-414-5645
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 - San Clemente Avenida Vista Hermosa - Employer Drug Testing Not Offered

1300 Avenida Vista Hermosa,

Ste 160

San Clemente, CA 92673

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55.87 mi away

Schedule Appointment 949-391-0237
Monday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Tuesday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Wednesday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Thursday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Friday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - San Clemente Oceanview

675 Camino De Los Mares,

Ste 300

San Clemente, CA 92673

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57.43 mi away

Schedule Appointment 949-303-0425
Monday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Tuesday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Wednesday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Thursday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Friday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Murrieta Antelope

33050 Antelope Rd,

Ste 204

Murrieta, CA 92563

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60.04 mi away

Schedule Appointment 951-954-2424
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 - Dana Point Monarch Bay Plaza - Employer Drug Testing Not Offered

3 Monarch Bay Plz,

Ste 108

Dana Point, CA 92629

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61.49 mi away

Schedule Appointment 949-397-7645
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: Closed
Sunday: Closed
Quest Diagnostics - Lake Elsinore Mission Trail Road

32251 Mission Trl,

Ste G1

Lake Elsinore, CA 92530

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62.34 mi away

Schedule Appointment 951-471-3231
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 - Laguna Niguel Town Center - Employer Drug Testing Not Offered

30131 Town Center Dr,

Suite 140

Laguna Niguel, CA 92677

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63.36 mi away

Schedule Appointment 949-371-1950
Monday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Tuesday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Wednesday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Thursday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Friday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Menifee Haun Road - Employer Drug Testing Not Offered

29798 Haun Rd,

Ste 206

Menifee, CA 92586

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63.4 mi away

Schedule Appointment 951-370-9837
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 - Mission Viejo 26732 Crown Valley Pkwy

26732 Crown Valley Pkwy,

Ste 521

Mission Viejo, CA 92691

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64.03 mi away

Schedule Appointment 949-364-1490
Monday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Tuesday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Wednesday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Thursday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Friday: 7:00 am-11:30 am , 12:30 pm-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Mission Viejo 26800 Crown Valley Pkwy

26800 Crown Valley Pkwy,

Ste 480

Mission Viejo, CA 92691

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64.06 mi away

Schedule Appointment 949-312-0185
Monday: 8:00 am-12:30 pm , 1:30 pm-4:30 pm
Tuesday: 8:00 am-12:30 pm , 1:30 pm-4:30 pm
Wednesday: 8:00 am-12:30 pm , 1:30 pm-4:30 pm
Thursday: 8:00 am-12:30 pm , 1:30 pm-4:30 pm
Friday: 8:00 am-12:30 pm , 1:30 pm-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Sun City Bradley - Employer Drug Testing Not Offered

28125 Bradley Rd,

Ste 245

Sun City, CA 92586

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65.22 mi away

Schedule Appointment 951-434-8931
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 - Hemet Stetson - Employer Drug Testing Not Offered

3853 W Stetson Ave,

Ste 101

Hemet, CA 92545

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65.66 mi away

Schedule Appointment 951-282-5064
Monday: 5:30 am-4:00 pm
Tuesday: 5:30 am-4:00 pm
Wednesday: 5:30 am-4:00 pm
Thursday: 5:30 am-4:00 pm
Friday: 5:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Aliso Viejo Aliso Creek - Employer Drug Testing Not Offered

26671 Aliso Creek Rd,

Suite 102

Aliso Viejo, CA 92656

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66.62 mi away

Schedule Appointment 949-541-1720
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 - Rancho Santa Margarita El Paseo - Employer Drug Testing Not Offered

22312 El Paseo,

Ste H

Rancho Santa Margarita, CA 92688

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66.71 mi away

Schedule Appointment 949-236-0269
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: Closed
Sunday: Closed
Quest Diagnostics - Hemet Latham Ave

850 E Latham Ave,

Ste. 203 & 204

Hemet, CA 92543

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67.22 mi away

Schedule Appointment 951-663-7376
Monday: 8:00 am-3:00 pm
Tuesday: 8:00 am-3:00 pm
Wednesday: 8:00 am-3:00 pm
Thursday: 8:00 am-3:00 pm
Friday: 8:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Laguna Paseo De Valencia

23521 Paseo De Valencia,

Suite 302C

Laguna Hills, CA 92653

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68.17 mi away

Schedule Appointment 949-315-9674
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: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Foothill Ranch - Employer Drug Testing Not Offered

26672 Portola Pkwy,

Foothill Ranch, CA 92610

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71.14 mi away

Schedule Appointment 657-732-2332
Monday: 8:00 am-4:30 pm
Tuesday: 8:00 am-4:30 pm
Wednesday: 8:00 am-4:30 pm
Thursday: 8:00 am-4:30 pm
Friday: 8:00 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Irvine Laguna Canyon Road - Employer Drug Testing Not Offered

15825 Laguna Canyon Rd,

Suite 108

Irvine, CA 92618

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72.77 mi away

Schedule Appointment 949-275-7389
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 - Newport Beach Avocado Avenue - Employer Drug Testing Not Offered

1401 Avocado Ave,

Ste 103

Newport Beach, CA 92660

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73.1 mi away

Schedule Appointment 949-275-7313
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: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Irvine 4950 Barranca Parkway

4950 Barranca Pkwy,

Ste 209

Irvine, CA 92604

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74.29 mi away

Schedule Appointment 949-246-7192
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: 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. © 2026 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only. May include AI-generated and/or AI-modified imagery.