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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 - Mission Viejo 26732 Crown Valley Pkwy

26732 Crown Valley Pkwy,

Ste 521

Mission Viejo, CA 92691

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4.17 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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4.23 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 - San Clemente Avenida Vista Hermosa - Employer Drug Testing Not Offered

1300 Avenida Vista Hermosa,

Ste 160

San Clemente, CA 92673

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4.59 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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5.13 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 - Laguna Niguel Town Center - Employer Drug Testing Not Offered

30131 Town Center Drive,

Suite 140

Laguna Niguel, CA 92677

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5.83 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 - Dana Point Monarch Bay Plaza - Employer Drug Testing Not Offered

3 Monarch Bay Plz,

Ste 108

Dana Point, CA 92629

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6.92 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 - Aliso Viejo Aliso Creek - Employer Drug Testing Not Offered

26671 Aliso Creek Road,

Suite 102

Aliso Viejo, CA 92656

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7.38 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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7.95 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 - Laguna Paseo De Valencia

23521 Paseo De Valencia,

Suite 302C

Laguna Hills, CA 92653

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8.27 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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11.34 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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12.86 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 - Irvine 4950 Barranca Parkway

4950 Barranca Pkwy,

Ste 209

Irvine, CA 92604

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14.51 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
Quest Diagnostics - Irvine 4050 Barranca Parkway - Employer Drug Testing Not Offered

4050 Barranca Pkwy,

Ste 120

Irvine, CA 92604

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15.31 mi away

Schedule Appointment 949-786-3822
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 - Newport Beach Avocado Avenue - Employer Drug Testing Not Offered

1401 Avocado Ave,

Ste 103

Newport Beach, CA 92660

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15.35 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 - Tustin Kensington - Employer Drug Testing Not Offered

15000 Kensington Park Ave,

Ste 190

Tustin, CA 92782

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17.27 mi away

Schedule Appointment 442-256-1508
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 - Costa Mesa Newport Boulevard - Employer Drug Testing Not Offered

1640 Newport Blvd,

Ste 310

Costa Mesa, CA 92627

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18.43 mi away

Schedule Appointment 949-205-6520
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 - Lake Elsinore Mission Trail Road

32251 Mission Trl,

Ste G1

Lake Elsinore, CA 92530

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18.63 mi away

Schedule Appointment 951-471-3231
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 - Newport Beach Placentia Avenue - Employer Drug Testing Not Offered

355 Placentia Ave,

Ste 204

Newport Beach, CA 92663

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18.73 mi away

Schedule Appointment 949-205-5529
Monday: 6:00 am-2:30 pm
Tuesday: 6:00 am-2:30 pm
Wednesday: 6:00 am-2:30 pm
Thursday: 6:00 am-2:30 pm
Friday: 6:00 am-2:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Inside Santa Ana Vons Store

3650 S Bristol St,

.

Santa Ana, CA 92704

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19.2 mi away

Schedule Appointment 866-697-8378
Monday: 7:00 am-11:00 am , 12:00 pm-4:00 pm
Tuesday: 7:00 am-11:00 am , 12:00 pm-4:00 pm
Wednesday: 7:00 am-11:00 am , 12:00 pm-4:00 pm
Thursday: 7:00 am-11:00 am , 12:00 pm-4:00 pm
Friday: 7:00 am-11:00 am , 12:00 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Costa Mesa Baker Street - Employer Drug Testing Not Offered

1190 Baker St,

Ste 104

Costa Mesa, CA 92626

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19.34 mi away

Schedule Appointment 949-205-6675
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 - Santa Ana Hemlock Way - Employer Drug Testing Not Offered

1220 Hemlock Way,

Ste 101

Santa Ana, CA 92707

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19.59 mi away

Schedule Appointment 714-483-1425
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 - Santa Ana Tustin Avenue

801 N Tustin Ave,

Ste 102

Santa Ana, CA 92705

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19.89 mi away

Schedule Appointment 657-401-7905
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 - Fallbrook East Elder Street - Employer Drug Testing Not Offered

521 E Elder St,

Ste 201

Fallbrook, CA 92028

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21.48 mi away

Schedule Appointment 442-245-0985
Monday: 7:30 am-11:30 am , 12:30 pm-2:30 pm
Tuesday: 7:30 am-11:30 am , 12:30 pm-2:30 pm
Wednesday: 7:30 am-11:30 am , 12:30 pm-2:30 pm
Thursday: 7:30 am-11:30 am , 12:30 pm-2:30 pm
Friday: 7:30 am-11:30 am , 12:30 pm-2:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Inside Huntington Beach Vons Store-(Located at Landmark Plaza)

8891 Atlanta Ave,

Huntington Beach, CA 92646

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21.61 mi away

Schedule Appointment 714-465-1608
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 - Fountain Valley 18785 Brookhurst

18785 Brookhurst Street,

Suite 103

Fountain Valley, CA 92708

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21.77 mi away

Schedule Appointment 714-274-4064
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: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Fountain Valley Warner Avenue - Employer Drug Testing Not Offered

11180 E Warner Ave,

Ste 159

Fountain Valley, CA 92708

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21.87 mi away

Schedule Appointment 714-556-2774
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 - Murrieta Medical Center - Employer Drug Testing Not Offered

25460 Medical Center Dr,

Ste 102

Murrieta, CA 92562

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22.29 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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22.36 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 - Orange 1010 West La Veta

1010 W La Veta Ave,

Ste 140

Orange, CA 92868

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22.36 mi away

Schedule Appointment 714-953-2926
Monday: 6:00 am-4:30 pm
Tuesday: 6:00 am-4:30 pm
Wednesday: 6:00 am-4:30 pm
Thursday: 6:00 am-4:30 pm
Friday: 6:00 am-4:30 pm
Saturday: 7:00 am-1:00 pm
Sunday: Closed
Quest Diagnostics - Orange 1140 La Veta - Employer Drug Testing Not Offered

1140 W La Veta Ave,

Ste 570

Orange, CA 92868

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22.42 mi away

Schedule Appointment 714-550-6318
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 - Orange South Main St - Employer Drug Testing Not Offered

230 S Main St,

Ste 220

Orange, CA 92868

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22.79 mi away

Schedule Appointment 714-634-2052
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: Closed
Sunday: Closed
Quest Diagnostics - Huntington Beach Beach Boulevard-(Located in Albertson Parking Lot)

19582 Beach Blvd,

Ste 300

Huntington Beach, CA 92648

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22.93 mi away

Schedule Appointment 714-964-8701
Monday: 6:00 am-4:30 pm
Tuesday: 6:00 am-4:30 pm
Wednesday: 6:00 am-4:30 pm
Thursday: 6:00 am-4:30 pm
Friday: 6:00 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Corona Main

2250 S. Main St,

Ste 105

Corona, CA 92882

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22.95 mi away

Schedule Appointment 951-415-4195
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 - Huntington Beach Main Street-(Located in 2nd Medical building behind 76 gas station)

18800 Main St,

Ste 206

Huntington Beach, CA 92648

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23.57 mi away

Schedule Appointment 714-375-1957
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
Quest Diagnostics - Temecula Single Oak- Employer Drug Testing Not Offered

28780 Single Oak Dr,

Ste 275

Temecula, CA 92590

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23.58 mi away

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

27699 Jefferson Ave,

Ste 109

Temecula, CA 92590

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23.6 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 - Garden Grove Garden Grove

12665 Garden Grove Blvd,

Ste 714

Garden Grove, CA 92843

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23.8 mi away

Schedule Appointment 714-638-5833
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 - Huntington Beach 17742 Beach-(Located on Huntington Beach Hospital Campus)

17742 Beach Blvd,

Ste 228

Huntington Beach, CA 92647

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23.82 mi away

Schedule Appointment 714-596-2434
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 - Westminster Brookhurst - Employer Drug Testing Not Offered

15355 Brookhurst Street,

Suite 102-108

Westminster, CA 92683

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23.85 mi away

Schedule Appointment 714-418-0035
Monday: 5:00 am-2:00 pm
Tuesday: 5:00 am-2:00 pm
Wednesday: 5:00 am-2:00 pm
Thursday: 5:00 am-2:00 pm
Friday: 5:00 am-2:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Anaheim Hills Anaheim Hills - Employer Drug Testing Not Offered

500 S Anaheim Hills Rd,

Ste 121

Anaheim, CA 92807

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23.86 mi away

Schedule Appointment 714-279-0523
Monday: 5:00 am-2:00 pm
Tuesday: 5:00 am-2:00 pm
Wednesday: 5:00 am-2:00 pm
Thursday: 5:00 am-2:00 pm
Friday: 5:00 am-2:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Corona W 6th St (308 W. 6th street suite 201)

308 W 6Th St,

Suite 201

Corona, CA 92882

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24.27 mi away

Schedule Appointment 951-415-5610
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: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Murrieta Antelope

33050 Antelope Rd,

Ste 204

Murrieta, CA 92563

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24.56 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 - Inside Orange Vons Store - Employer Drug Testing Not Offered

2684 N Tustin St,

Orange, CA 92865

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24.66 mi away

Schedule Appointment 714-941-3172
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

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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.