#1Alton Memorial Hospital
Based in IL
Clinical Research Sites in Madison County, IL
The top-ranked clinical research sites serving Madison County, IL are Alton Memorial Hospital, OSF Saint Anthony's Health Center and Saint Anthony's Health. We list 188 clinical research sites serving Madison County, IL. 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 Madison County, IL. 188 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 Madison County
#2OSF Saint Anthony's Health Center
Based in IL#3Saint Anthony's Health
Based in IL#4Cancer Care Center of O'Fallon
Serves this area from O'Fallon, IL (16 mi)#5Cancer Care Specialists of Central Illinois
Serves this area from O'Fallon, IL (16 mi)#6Cancer Care Specialists of Illinois
Serves this area from O'Fallon, IL (16 mi)#7Cancer Care Specialists of Illinois - Cancer Care Center of O'Fallon
Serves this area from O'Fallon, IL (16 mi)#8Gateway Clinical Trials
Serves this area from O'Fallon, IL (16 mi)#9Hospital Sisters Health System (HSHS) - St Elizabeth's Hospital
Serves this area from O'Fallon, IL (16 mi)#10HSHS Saint Elizabeth's Hospital
Serves this area from O'Fallon, IL (16 mi)
20 more providers serving this area
- HSHS St. Elizabeth's Hospital, O'Fallon, IL (16 mi)
- Memorial Hospital, O'Fallon, IL (16 mi)
- Memorial Hospital East, O'Fallon, IL (16 mi)
- Siteman Cancer Center - Shiloh, O'Fallon, IL (16 mi)
- Christian Hospital, MO
- Saint Louis Heart and Vascular PC, MO
- Siteman Cancer Center at Christian Hospital, MO
- St. Louis Heart and Vascular, MO
- St. Louis Heart and Vascular Cardiology, MO
- St Louis Heart & Vascular, P.C., MO
- Cancer Care Specialists of Illinois-Swansea, Swansea, IL (21 mi)
- Memorial Hospital Belleville, Swansea, IL (21 mi)
- Southwest Illinois Health Services LLP, Swansea, IL (21 mi)
- St. Louis VA, St. Louis, MO (21 mi)
- St. Louis VA Medical Center, St. Louis, MO (21 mi)
- St. Louis VA Medical Center John Cochran Division, St. Louis, MO, St. Louis, MO (21 mi)
- VA St. Louis Healthcare System, St. Louis, MO (21 mi)
- VA St. Louis Health Care System, St. Louis, MO (21 mi)
- Macoupin Research Group, IL
- Cardinal Glennon Children's Hospital, St. Louis, MO (23 mi)
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Frequently asked questions
How many clinical research sites serve Madison County?
We list 188 clinical research sites serving Madison County, IL: 3 based there and 185 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 Madison County?
The top-ranked clinical research sites serving Madison County, IL are Alton Memorial Hospital, OSF Saint Anthony's Health Center, Saint Anthony's Health, Cancer Care Center of O'Fallon and Cancer Care Specialists of Central Illinois. The full ranked list, with the official records each provider matched, is on this page.
Which clinical research sites serving Madison County are verified against official records?
10 of the top 10 match an active official record: Alton Memorial Hospital (ClinicalTrials.gov), OSF Saint Anthony's Health Center (ClinicalTrials.gov), Saint Anthony's Health (ClinicalTrials.gov), Cancer Care Center of O'Fallon (ClinicalTrials.gov) and Cancer Care Specialists of Central Illinois (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 .
Communities served
Granite City, Edwardsville, Alton, Collinsville, Godfrey, Glen Carbon, Troy, Wood River, Highland, Bethalto, Maryville, Pontoon Beach, East Alton, Rosewood Heights, Madison, Holiday Shores, South Roxana, Venice, Roxana, St. Jacob, Mitchell, Hartford, Worden, Marine, Hamel, Livingston, Alhambra, Moro, Grantfork, New Douglas, Williamson, Prairietown