Quest Diagnostics

Lab Testing at Ohs Health And Safety Svcs, Inc

Quest partner location in Costa Mesa, CA 92626.

Partner Location

This location is part of Quest's partner network. Services and availability may differ from a standard Quest Patient Service Center. Please call 949-764-9301 before visiting to confirm they accept your lab order.

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Note: tests available at this location depend on its services. Confirm by calling before visiting.

Address

3303 Harbor Blvd Bldg G-2
Costa Mesa, CA 92626
Orange County

949-764-9301

Hours

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

Nearby alternatives

Quest Diagnostics - Costa Mesa Baker Street - Employer Drug Testing Not Offered
1190 Baker St Ste 104, Costa Mesa, CA 92626
1.2 mi
Quest Diagnostics - Fountain Valley Warner Avenue - Employer Drug Testing Not Offered
11180 E Warner Ave Ste 159, Fountain Valley, CA 92708
1.7 mi
LabCorp Fountain Valley
11180 Warner Ave Ste 455, Fountain Valley, CA 92708
1.7 mi
Quest Diagnostics - Fountain Valley 18785 Brookhurst
18785 Brookhurst St Suite 103, Fountain Valley, CA 92708
1.9 mi
LabCorp Fountain Valley
18111 Brookhurst St, Fountain Valley, CA 92708
2 mi

About this location

Quest partner location. Quest Diagnostics operates one of the largest networks of clinical laboratories in the United States, offering a wide range of diagnostic tests for patients, physicians, and employers.

Listing last updated 2026-04-25.