Quest Diagnostics
Medical LabsHours:
293 Commerce Ave, Manteca CA 95336 Hours
About Quest Diagnostics
Quest Diagnostics on East Commerce Avenue is located in the Commerce Shopping Center, with an entrance next to Pier 1 and Sylvan Learning Center. This location offers routine lab tests, blood and urine testing, drug screens for DOT and non-DOT purposes, pediatric specialty services, glucose tolerance tests, and COVID-19 antibody testing by appointment. Appointments can be scheduled online, and walk-in availability is now very limited. Reviews note that staff members are often very pleasant, helpful, kind, nice, sweet, efficient, and understanding. Specific positive experiences include staff honoring an appointment despite an error for a fast and easy visit, reopening for a patient arriving near closing for efficient and amicable service, and providing patient, careful care for a young child. Some patients find the shift to a primarily appointment-based system, where online bookings can appear full, to be an inconvenience compared to former walk-in availability. Operating hours for drug screens are Monday through Friday from 9:00 am to 3:00 pm.
Most Recent Reviews
March 2026
Seen at appt time. Phlebotomy tech was professional, friendly and made experience almost pain free!
February 2026
The appointment process works great, in and out on time. Very helpful Phlebotomist, friendly, efficient. when arriving I click a link and that is all the registration needed. And Now my Dr can send the lab request directly to Quest and I don't have to worry about paper work, even faster and more efficient
October 2025
Apparently they're two Quest Diagnostics offices near Target. This one was way better than the other one. This doesn't come up on maps though.
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- Manteca, California
