#1Psychiatric Care and Research Center
Serves this area from O'Fallon, MO (2 mi)
Clinical Research Sites in O'Fallon, MO
The top-ranked clinical research sites serving O'Fallon, MO are Psychiatric Care and Research Center, Midwest Research Group and St. Charles Clinical Research. We list 105 clinical research sites serving O'Fallon, MO. 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 O'Fallon, MO (St. Charles County). 105 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 O'Fallon
#2Midwest Research Group
Serves this area from Weldon Spring Heights, MO (5 mi)#3St. Charles Clinical Research
Serves this area from Weldon Spring Heights, MO (5 mi)#4St. Charles Psychiatric Associates - Midwest Research Group
Serves this area from Weldon Spring Heights, MO (5 mi)#5Elixia MNA
Serves this area from St. Peters, MO (6 mi)#6Siteman Cancer Center at Saint Peters Hospital
Serves this area from St. Peters, MO (6 mi)#7Siteman Cancer Center - Saint Peters
Serves this area from St. Peters, MO (6 mi)#8Siteman Cancer Center - St Peters
Serves this area from St. Peters, MO (6 mi)#9Washington University Medical School
Serves this area from St. Peters, MO (6 mi)#10Clinical Research Professionals
Serves this area from Wildwood, MO (10 mi)
20 more providers serving this area
- Galen Research LLC, Wildwood, MO (10 mi)
- StudyMetrix Research LLC, MO
- DelRicht Research - Town and Country, Chesterfield, MO (13 mi)
- Gateway Gastroenterology - Site Number: 8400097, Chesterfield, MO (13 mi)
- Midwest Vision Research Foundation, Chesterfield, MO (13 mi)
- Pepose Vision Institute, Chesterfield, MO (13 mi)
- Saint Louis Pain Consultants, Chesterfield, MO (13 mi)
- Saint Luke's Hospital, Chesterfield, MO (13 mi)
- St. Luke's Hospital, Chesterfield, MO (13 mi)
- The Lung Research Center, LLC, Chesterfield, MO (13 mi)
- Mercy Oncology and Hematology - Clayton-Clarkson, Ballwin, MO (15 mi)
- Saint Louis Cancer and Breast Institute-Ballwin, Ballwin, MO (15 mi)
- Exercise and Performance Nutrition Laboratory, MO
- Lindenwood University, MO
- Midwest Chest Consultants, PC, MO
- SSM Health DePaul Hospital, Bridgeton, MO (16 mi)
- St. Louis Cancer Care, LLP, Bridgeton, MO (16 mi)
- St. Louis Heart and Vascular, Bridgeton, MO (16 mi)
- Arch Clinical Trials, Creve Coeur, MO (17 mi)
- Barnes-Jewish West County Hospital, Creve Coeur, MO (17 mi)
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Frequently asked questions
How many clinical research sites serve O'Fallon?
We list 105 clinical research sites serving O'Fallon, MO: 0 based there and 105 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 O'Fallon?
The top-ranked clinical research sites serving O'Fallon, MO are Psychiatric Care and Research Center, Midwest Research Group, St. Charles Clinical Research, St. Charles Psychiatric Associates - Midwest Research Group and Elixia MNA. The full ranked list, with the official records each provider matched, is on this page.
Which clinical research sites serving O'Fallon are verified against official records?
10 of the top 10 match an active official record: Psychiatric Care and Research Center (ClinicalTrials.gov), Midwest Research Group (ClinicalTrials.gov), St. Charles Clinical Research (ClinicalTrials.gov), St. Charles Psychiatric Associates - Midwest Research Group (ClinicalTrials.gov) and Elixia MNA (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 .