Quest Diagnostics
Lab Testing at Ontario Testing Center, Inc
Quest partner location in Ontario, CA 91761.
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 909-937-3955 before visiting to confirm they accept your lab order.
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Address
402 S Milliken Ave Ste E2Ontario, CA 91761
San Bernardino County
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 | 9:00 AM – 12:00 PM |
| Sunday | Closed |
Nearby alternatives
- Comp - Ontario59 S Milliken Ave Ste 100, Ontario, CA 917610.3 mi
- Proactive Work Ontario1801 Excise Ave Ste 108, Ontario, CA 917611.6 mi
- Examone - Riverside9220 Haven Ave Ste 250, Rancho Cucamonga, CA 917302.1 mi
- LabCorp Rancho Cucamonga10801 Foothill Blvd Ste 104, Rancho Cucamonga, CA 917303.3 mi
- LabCorp Upland1310 San Bernardino Rd Ste 107, Upland, CA 917865.2 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.