801 N Tustin Ave,
Ste 102
Santa Ana, CA 92705
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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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2.79 mi away
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
3.62 mi away
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
4.56 mi away
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
4.66 mi away
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
4.9 mi away
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
5.55 mi away
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
5.8 mi away
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
5.85 mi away
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 - Inside Orange Vons Store - Employer Drug Testing Not Offered
2684 N Tustin St,
Orange, CA 92865
Get Directions5.9 mi away
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
6.46 mi away
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
6.62 mi away
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
7.01 mi away
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
7.01 mi away
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 - Foothill Ranch - Employer Drug Testing Not Offered
26672 Portola Pkwy,
Foothill Ranch, CA 92610
Get Directions8.11 mi away
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
8.58 mi away
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
8.59 mi away
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
9.34 mi away
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 - Placentia North Rose
1206 E Yorba Linda Blvd,
Placentia, CA 92870
Get Directions9.4 mi away
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
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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.