Quest Diagnostics

Lab Testing at Quest Diagnostics - Castro Valley Lake Chabot - Employer Drug Testing Not Offered

Quest Diagnostics Patient Service Center in Castro Valley, CA 94546.

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Popular tests at this location:

TSH Lipid Panel CBC A1C Testosterone Vitamin D CMP

Address

20400 Lake Chabot Rd Ste 101
Castro Valley, CA 94546
Alameda County

510-881-1570

Hours

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

Nearby alternatives

LabCorp Castro Valley
20211 Patio Dr Suite 200, Castro Valley, CA 94546
0.6 mi
Checkpoint Otc
24326 Mission Blvd Ste 3, Hayward, CA 94544
2.2 mi
Quest Diagnostics - Hayward Southland Mall - Employer Drug Testing Not Offered
1 Southland Mall Dr Suite 718, Hayward, CA 94545
3.3 mi
LabCorp San Leandro
13847 E 14th St Ste 100, San Leandro, CA 94578
3.3 mi
Quest Diagnostics - San Leandro East 14th - Employer Drug Testing Not Offered
13847 E 14th St Ste 111, San Leandro, CA 94578
3.3 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.