#1Western University College of Optometry
Serves this area from Pomona, CA (5 mi)
Clinical Research Sites in Diamond Bar, CA
The top-ranked clinical research sites serving Diamond Bar, CA are Western University College of Optometry, Western University of Health Sciences and National Institute of Clinical Research, Inc.. We list 974 clinical research sites serving Diamond Bar, CA. 30 of the providers shown match an active record from ClinicalTrials.gov, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
Clinical Research Sites serving Diamond Bar, CA (Los Angeles County). 974 providers, 10 of the top 10 verified against federal or state records. Registry records checked on 2026-11-04.
Top 10 ranked clinical research sites for Diamond Bar
#2Western University of Health Sciences
Serves this area from Pomona, CA (5 mi)#3National Institute of Clinical Research, Inc.
Serves this area from Pomona, CA (5 mi)#4Casa Colina Hospital and Centers for Healthcare
Serves this area from Pomona, CA (5 mi)#5Valley Clinical Trials
Serves this area from Covina, CA (7 mi)#6Valley Clinical Trials, LLC dba Flourish Research
Serves this area from Covina, CA (7 mi)#7Dream Team Clinical Research
Serves this area from Pomona, CA (7 mi)#8Empire Clinical Research
Serves this area from Pomona, CA (7 mi)#9Empire Clinical Research - Pomona
Serves this area from Pomona, CA (7 mi)#10Pomona Valley Hospital Medical Center
Serves this area from Pomona, CA (7 mi)
20 more providers serving this area
- The Neurology Group, Pomona, CA (7 mi)
- N America Res Inst - San Dimas, San Dimas, CA (7 mi)
- North America Research Institute, San Dimas, CA (7 mi)
- North America Research Institute - San Dimas, San Dimas, CA (7 mi)
- UCI Health - Yorba Linda, Yorba Linda, CA (7 mi)
- Inland Psychiatric Medical Group., Chino, CA (8 mi)
- Inland Psychiatric Medical Group (IPMG)-Chino, Chino, CA (8 mi)
- Center for Clinical Trials of San Gabriel, West Covina, CA (8 mi)
- City of Hope West Covina, West Covina, CA (8 mi)
- Kinetic Clinical Research, West Covina, CA (8 mi)
- Next Level Clinical Trials, LLC, West Covina, CA (8 mi)
- Medvin Clinical Research, Covina, CA (8 mi)
- Medvin Clinical Research - Covina, Covina, CA (8 mi)
- Catalina Research Institute, LLC, Montclair, CA (8 mi)
- Thrive Clinical Research Group, Glendora, CA (8 mi)
- Omega Clinical Trials - La Habra, La Habra, CA (9 mi)
- Fullerton Neuro and Headache Ctr, Fullerton, CA (9 mi)
- Fullerton Neurological Center, Fullerton, CA (9 mi)
- Fullerton Neurology and Headache Center, Fullerton, CA (9 mi)
- Providence Medical Foundation, Fullerton, CA (9 mi)
Request quotes
Frequently asked questions
How many clinical research sites serve Diamond Bar?
We list 974 clinical research sites serving Diamond Bar, CA: 0 based there and 974 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.
Which clinical research sites serve Diamond Bar?
The top-ranked clinical research sites serving Diamond Bar, CA are Western University College of Optometry, Western University of Health Sciences, National Institute of Clinical Research, Inc., Casa Colina Hospital and Centers for Healthcare and Valley Clinical Trials. The full ranked list, with the official records each provider matched, is on this page.
Which clinical research sites serving Diamond Bar are verified against official records?
10 of the top 10 match an active official record: Western University College of Optometry (ClinicalTrials.gov), Western University of Health Sciences (ClinicalTrials.gov), National Institute of Clinical Research, Inc. (ClinicalTrials.gov), Casa Colina Hospital and Centers for Healthcare (ClinicalTrials.gov) and Valley Clinical Trials (ClinicalTrials.gov), and 5 more on this page. Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.
How do sponsors judge a research site?
Common checks are enrollment history in the indication, experienced coordinators, IRB arrangements, start-up time and data quality. ClinicalTrials.gov shows which studies a site has been listed on.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .