Quest Diagnostics

Lab Testing at Fastest Labs Of Modesto

Quest partner location in Modesto, CA 95354.

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 209-200-8050 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

400 12th St Ste 4
Modesto, CA 95354
Stanislaus County

209-200-8050

Hours

Monday	9:00 AM – 6:30 PM
Tuesday	9:00 AM – 6:30 PM
Wednesday	9:00 AM – 6:30 PM
Thursday	9:00 AM – 6:30 PM
Friday	9:00 AM – 6:30 PM
Saturday	Closed
Sunday	Closed

Nearby alternatives

Quest Diagnostics - Modesto 6th Street
1008 6th St Suite C, Modesto, CA 95354
0.7 mi
LabCorp Modesto
1101 Mchenry Ave, Modesto, CA 95350
1.6 mi
Quest Diagnostics - Modesto Mchenry Avenue - Employer Drug Testing Not Offered
1524 Mchenry Ave Ste 120, Modesto, CA 95350
2 mi
LabCorp Modesto
1541 Florida Ave Ste 102, Modesto, CA 95350
2.1 mi
Quest Diagnostics - Modesto E Orangeburg Ave
2222 E Orangeburg Ave Suite 104, Modesto, CA 95355
2.7 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.