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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 - Placentia North Rose

1206 E Yorba Linda Blvd,

Placentia, CA 92870

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0.9 mi away

Schedule Appointment 657-226-6771
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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3.39 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
Quest Diagnostics - Fullerton Harbor

2720 N Harbor Blvd,

Ste 100

Fullerton, CA 92835

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4.13 mi away

Schedule Appointment 657-217-1883
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: 5:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Anaheim La Palma - Employer Drug Testing Not Offered

1120 W La Palma Ave,

Ste 7

Anaheim, CA 92801

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4.71 mi away

Schedule Appointment 657-276-5643
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 - Anaheim Hills Anaheim Hills - Employer Drug Testing Not Offered

500 S Anaheim Hills Rd,

Ste 121

Anaheim, CA 92807

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4.89 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 - Orange South Main St - Employer Drug Testing Not Offered

230 S Main St,

Ste 220

Orange, CA 92868

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6.61 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 - Orange 1010 West La Veta

1010 W La Veta Ave,

Ste 140

Orange, CA 92868

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6.96 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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6.97 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 - Anaheim Ball

2229 W. Ball Road,

Suite C

Anaheim, CA 92804

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7.07 mi away

Schedule Appointment 714-780-0124
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 - Garden Grove Garden Grove

12665 Garden Grove Blvd,

Ste 714

Garden Grove, CA 92843

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7.86 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 - Hacienda Heights-Azusa Ave

1613 S Azusa Ave,

Hacienda Heights, CA 91745

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8.82 mi away

Schedule Appointment 626-409-9869
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-11:00 am
Sunday: Closed
Quest Diagnostics - Santa Ana Tustin Avenue

801 N Tustin Ave,

Ste 102

Santa Ana, CA 92705

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8.92 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 - Whittier 15141 Whittier Blvd

15141 Whittier Blvd,

Ste 125

Whittier, CA 90603

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9.16 mi away

Schedule Appointment 562-204-9911
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 - La Palma 5418 La Palma Ave - Employer Drug Testing Not Offered

5418 La Palma Ave,

La Palma, CA 90623

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9.99 mi away

Schedule Appointment 562-215-5703
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

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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.