#1Centralia Oncology Clinic
Based in Centralia, IL
Clinical Research Sites in Marion County, IL
The top-ranked clinical research sites serving Marion County, IL are Centralia Oncology Clinic, Saint Mary's Hospital and Good Samaritan Regional Health Center. We list 4 clinical research sites serving Marion County, IL. 4 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 Marion County, IL. 4 providers, 4 of the top 4 verified against federal or state records. Registry records checked on 2026-11-04.
Top 4 ranked clinical research sites for Marion County
| # | Provider | Verified records | Based in | Phone |
|---|---|---|---|---|
| 1 | Centralia Oncology Clinic | Site on 205 active studies registered on ClinicalTrials.gov | Centralia, IL | — |
| 2 | Saint Mary's Hospital | Site on 63 active studies registered on ClinicalTrials.gov | Centralia, IL | — |
| 3 | Good Samaritan Regional Health Center | Site on 46 active studies registered on ClinicalTrials.gov | IL | — |
| 4 | SSM Health Good Samaritan | Site on 138 active studies registered on ClinicalTrials.gov | IL | — |
#2Saint Mary's Hospital
Based in Centralia, IL#3Good Samaritan Regional Health Center
Serves this area from IL#4SSM Health Good Samaritan
Serves this area from IL
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Frequently asked questions
How many clinical research sites serve Marion County?
We list 4 clinical research sites serving Marion County, IL: 2 based there and 2 serving it from nearby. 4 of the top 4 match an active federal or state record, checked on 2026-11-04.
Which clinical research sites serve Marion County?
The top-ranked clinical research sites serving Marion County, IL are Centralia Oncology Clinic, Saint Mary's Hospital, Good Samaritan Regional Health Center and SSM Health Good Samaritan. The full ranked list, with the official records each provider matched, is on this page.
Which clinical research sites serving Marion County are verified against official records?
4 of the top 4 match an active official record: Centralia Oncology Clinic (ClinicalTrials.gov), Saint Mary's Hospital (ClinicalTrials.gov), Good Samaritan Regional Health Center (ClinicalTrials.gov) and SSM Health Good Samaritan (ClinicalTrials.gov). 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
Centralia, Salem, Sandoval, Central City, Odin, Kinmundy, Junction City, Patoka, Iuka, Alma, Kell, Vernon, Walnut Hill