Quest Diagnostics

Lab Testing at Prime Drug Testing Llc

Drug testing partner location in Lathrop, CA 95330.

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 209-417-6300 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

143 Darcy Pkwy
Lathrop, CA 95330
San Joaquin County

209-417-6300

Hours

Monday	9:00 AM – 5:00 PM
Tuesday	9:00 AM – 5:00 PM
Wednesday	9:00 AM – 5:00 PM
Thursday	9:00 AM – 5:00 PM
Friday	9:00 AM – 5:00 PM
Saturday	vary
Sunday	Closed

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About this location

Drug testing 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.