Quest Diagnostics

Lab Testing at Quest Diagnostics - West Covina - California Ave

Quest Diagnostics Patient Service Center in West Covina, CA 91790.

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Popular tests at this location:

TSH Lipid Panel CBC A1C Testosterone Vitamin D CMP

Address

553 S California Ave Ste A
West Covina, CA 91790
Los Angeles County

626-718-7660

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 West Covina
933 S Sunset Ave Suite 201, West Covina, CA 91790
0.9 mi
LabCorp Covina
420 W Rowland St, Covina, CA 91723
2.1 mi
Quest Diagnostics - Covina East San Bernardino Road
554 E San Bernardino Rd Ste 103, Covina, CA 91723
3.4 mi
Universal Industrial Care
16025 E Gale Avenue Ste B-10, Industry, CA 91745
4.3 mi
Quest Diagnostics - Hacienda Heights - Azusa Ave
1613 S Azusa Ave, Hacienda Heights, CA 91745
5.1 mi

More lab options around West Covina

All West Covina lab locationsCompare draw centers in West Covina, CA.LabCorp West Covina933 S Sunset Ave Suite 201, West Covina, CA 91790

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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.