Quest Diagnostics

Lab Testing at Quest Diagnostics - Concord Clayton Rd

Quest Diagnostics Patient Service Center in Concord, CA 94521.

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Popular tests at this location:

TSH Lipid Panel CBC A1C Testosterone Vitamin D CMP

Address

4383 Clayton Rd Suite 20
Concord, CA 94521
Contra Costa County

831-212-2754

Hours

Monday	7:30 AM – 4:30 PM
Tuesday	7:30 AM – 4:30 PM
Wednesday	7:30 AM – 4:30 PM
Thursday	7:30 AM – 4:30 PM
Friday	7:30 AM – 4:30 PM
Saturday	8:00 AM – 12:00 PM
Sunday	Closed

Nearby alternatives

LabCorp Concord
5161 Clayton Rd Ste H, Concord, CA 94521
1.3 mi
Quest Diagnostics - Walnut Creek Oak Grove Rd
2250 Oak Grove Rd, Walnut Creek, CA 94598
2.7 mi
LabCorp Concord
2425 East St Ste 6, Concord, CA 94520
2.8 mi
LabCorp Concord
1990 Monument Blvd, Concord, CA 94520
2.8 mi
LabCorp Concord
2540 East St D, Concord, CA 94520
2.8 mi

About this location

Quest Diagnostics Patient Service Center. 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.