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No front desk. No employees to greet or help you. Good luck
Other side of the lobby
Quest Diagnostics Medical Laboratory

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

Website: questdiagnostics.com

Phone: (909) 202-9122

Cross Streets: Near the intersection of Sierra Lakes Pkwy and Mango Ave

Interested in our services?

Closed now

  • Fri 7:00 AM - 4:00 PM

17051 Sierra Lakes Pkwy, Ste 250 Fontana, CA 92336 ·2139.95 mi

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Reviews

yelp
2.0 104 reviews
5 star
21 4 star
7 3 star
3 2 star
5 1 star
68
Tiffany L. 08/22/26

I came here for bloodwork on a Friday. I'm not sure why there's so many bad reviews, but I had a great experience. I made sure to make an appointment so I wouldn't be waiting forever. Once checked...

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Cesar R. 04/28/26

This review is for one staff (white & stocky) that can ruin their reputation. I saw my name on the check-in disappeared for a few minutes and no one was calling my name. Other names were being...

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Timothy B. 09/04/26

I never been treated so poorly! I checked in. There board which usually shows once you're in their system was not working. Last time I went I had problems with my checking get acknowledged by...

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Janelle C. 09/01/26

I have been coming here because it's next to the house but customer service is not great. The staff inside is great but corporate needs to hire someone to work the lobby . You check in and stare...

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Yaya M. 10/23/25

No there very rude Specially person in charge at time Just gave me a horrible time As is ur fasting u don't feel ur best And to be treated wrong is the worst .

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