421 March Ave,
Ste C
Healdsburg, CA 95448
Get Directions
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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9.97 mi away
Monday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Tuesday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Wednesday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Thursday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Friday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Saturday:
Closed
Sunday:
Closed
13.83 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
17.51 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:
7:30 am-11:30 am
Sunday:
Closed
27.77 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
Quest Diagnostics - Sonoma Perkins - Employer Drug Testing Not Offered
386 PERKINS ST,
SONOMA, CA 95476
Get Directions33.36 mi away
Monday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Tuesday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Wednesday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Thursday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Friday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Saturday:
Closed
Sunday:
Closed
Quest Diagnostics - Lakeport Hill Road - Employer Drug Testing Not Offered
5124 Hill Rd E,
Lakeport, CA 95453
Get Directions39.73 mi away
Monday:
6:30 am-10:30 am , 11:30 am-2:30 pm
Tuesday:
6:30 am-10:30 am , 11:30 am-2:30 pm
Wednesday:
6:30 am-10:30 am , 11:30 am-2:30 pm
Thursday:
6:30 am-10:30 am , 11:30 am-2:30 pm
Friday:
6:30 am-10:30 am , 11:30 am-2:30 pm
Saturday:
Closed
Sunday:
Closed
Quest Diagnostics - Napa Trancas
673 Trancas St,
Napa, CA 94558
Get Directions40.9 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:
7:30 am-11:30 am
Sunday:
Closed
Quest Diagnostics - Inside Nave Dr Safeway Store
5720 Nave Dr,
Novato, CA 94949
Get Directions41.2 mi away
Monday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Tuesday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Wednesday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Thursday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Friday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Saturday:
Closed
Sunday:
Closed
Quest Diagnostics - Inside San Rafael Safeway Store - Employer Drug Testing Not Offered
950 Las Gallinas Ave,
San Rafael, CA 94903
Get Directions43.7 mi away
Monday:
7:30 am-11:30 am , 12:30 pm-4:30 pm
Tuesday:
7:30 am-11:30 am , 12:30 pm-4:30 pm
Wednesday:
7:30 am-11:30 am , 12:30 pm-4:30 pm
Thursday:
7:30 am-11:30 am , 12:30 pm-4:30 pm
Friday:
7:30 am-11:30 am , 12:30 pm-4:30 pm
Saturday:
Closed
Sunday:
Closed
46.32 mi away
Monday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Tuesday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Wednesday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Thursday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Friday:
7:30 am-11:30 am , 12:30 pm-4:00 pm
Saturday:
Closed
Sunday:
Closed
47.68 mi away
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:
7:30 am-12:00 pm
Sunday:
Closed
47.89 mi away
Monday:
7:00 am-11:00 am , 12:00 pm-3:30 pm
Tuesday:
7:00 am-11:00 am , 12:00 pm-3:30 pm
Wednesday:
7:00 am-11:00 am , 12:00 pm-3:30 pm
Thursday:
7:00 am-11:00 am , 12:00 pm-3:30 pm
Friday:
7:00 am-11:00 am , 12:00 pm-3:30 pm
Saturday:
Closed
Sunday:
Closed
Quest Diagnostics - Vallejo Hospital Drive - Employer Drug Testing Not Offered
160 Hospital Dr,
Vallejo, CA 94589
Get Directions49.36 mi away
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
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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.