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Quest Diagnostics

3.4
(64 reviews)

Business Details

750 N Diamond Bar Blvd, Diamond Bar, CA
91765, United States
(909) 282-6817

About

Family Medicine
The Quest Diagnostics difference. Bringing together quality, speed, and technology to power advanced, affordable diagnostics for all. No trade-offs required.

Location

Quest Diagnostics
750 N Diamond Bar Blvd, Diamond Bar, CA
91765, United States

Hours

Monday7:00 AM - 12:00 PM
Tuesday7:00 AM - 12:00 PM
Wednesday7:00 AM - 12:00 PM
Thursday7:00 AM - 12:00 PM
Friday7:00 AM - 12:00 PM
SaturdayClosed
SundayClosed

Reviews

3.4
64 reviews
5 stars
32
4 stars
6
3 stars
3
2 stars
1
1 star
22
  • AM
    Ann Marie Miller
    Mar 17, 2026
    3.0
    Brused arm has never happened before. New Phleb. Remodel is nice. Restroom ledge on floor is a trip hazard.
  • PR
    Pete R
    Mar 4, 2026
    1.0
    First, the locations self check in screen needs to be replaced. Its touch screen is malfunctioning. I felt bad for all that had to use it. It ceated a huge line due to this, and one client who was in line ended up being marked late by the time they made it to the screen. They were in a wheelchair. When this was made known to one of the workers what happened, they said they'll make a note of it, but still had them wait for over 2 hours in the stand by and we're still there when I left. Even though I was a walk in, the computer told me I had 2 people in front of me and the wait would be 30 mins to an hour. I waited over 3 hours. I usually make an appointment, but this was a last minute request by my doctor for a procedure. I told him I'll never go back to Quest. It was hard for anyone to get help at that location due its configuration. 90% of the people who came in were elderly and some had limited English. Definitely not ADA compliant. I can see by the review s Quest does nothing about it. Ask your medical provider for Lab Corp or anyone else.
  • VR
    Vanessa Rivera
    Feb 17, 2026
    1.0
    If I could give this place a zero I would. This place lost my dad’s blood work and never turned it into the office and we’ve been waiting for a month almost and now we have to do it again. You can’t even call and talk to a person. Do better
  • CB
    Caleb Boyer
    Jan 6, 2026
    5.0
    I helped my neighbor go to Quest today, and it was a very smooth experience. We had a pretty complicated question involving various doctors orders and had trouble finding a suitable vein, but our technician Daniela handled everything smoothly and was very polite.
  • MB
    Manuel Bonilla
    Jan 4, 2026
    5.0
    They take care of business nurses are skilled

Brand Certified Facts from Quest Diagnostics

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Certified April 05, 2026Yext Knowledge Graph
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