Paid Clinical Trials in St Louis, MO

As of July 2026, 1,403 paid clinical trials are recruiting in St Louis, Missouri. Compensation typically covers time, travel, and study visits, with stipends ranging from modest amounts for short outpatient studies to several thousand dollars for long or inpatient protocols.

St Louis offers studies at sites including Washington University School of Medicine for conditions such as Breast Cancer, Prostate Cancer, Colorectal Cancer, Acute Myeloid Leukemia. Both patients with specific conditions and healthy volunteers can qualify. Most trials offer free study-related medical care alongside compensation.

Recruiting trial data synced daily from ClinicalTrials.gov. Last sync: .

Trials by specialty in St Louis

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Top Research Study Locations in St Louis

Researchers run research studies in St Louis, MO at 25 active sites. The clinics below currently host the largest number of recruiting studies — each name is followed by the conditions they focus on most.

SiteSpecializes inActive trials
Washington University School of MedicineBreast Cancer, Colorectal Cancer, Prostate Cancer456
Washington UniversityNSCLC, Advanced Solid Tumor, Amyotrophic Lateral Sclerosis137
Mercy Hospital Saint LouisMalignant Solid Neoplasm, Anatomic Stage II Breast Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v893
Washington University in St. LouisCardiovascular Diseases, Dementia, Acute Stress Disorder84
Mercy Hospital SouthStage IV Lung Cancer AJCC v8, Malignant Solid Neoplasm, Stage IIIB Lung Cancer AJCC v881
Missouri Baptist Medical CenterStage IV Lung Cancer AJCC v8, Stage IVB Prostate Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v879
Siteman Cancer Center-South CountyAcute Myeloid Leukemia, Stage IVB Prostate Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v870
Siteman Cancer Center at Christian HospitalAcute Myeloid Leukemia, Stage IVB Prostate Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v864
Mercy Infusion Center - ChippewaMalignant Solid Neoplasm, Breast Cancer, RISS Stage I Plasma Cell Myeloma26
Cardinal Glennon Children's Medical CenterNeuroblastoma, Osteosarcoma, Ewing Sarcoma24
Washington University School of Medicine in St. LouisOvarian Cancer, Lymphoma, Acute Myeloid Leukemia23
St. Louis Children's HospitalAcute Liver Failure, Acute Liver Injury, Adolescent Idiopathic Scoliosis20
Saint Louis UniversityOpioid Use, ACL Surgery, ALS18
Barnes Jewish HospitalIntracerebral Hemorrhage, Ischemic Stroke, Aortic Aneurysm, Abdominal14
Siteman Cancer CenterBreast Cancer, Advanced Hepatocellular Carcinoma, Advanced/Metastatic Urothelial Cancer12
Arch Clinical TrialsSchizophrenia, Bipolar 1 Disorder, Bipolar Disorder11
Barnes-Jewish HospitalAcute Ischemic Stroke, Advanced Hepatocellular Carcinoma, Advanced/Metastatic Urothelial Cancer10
Washington University School of Medicine - Siteman Cancer CenterAdvanced Hepatocellular Carcinoma, Advanced Solid Tumors, Adult, Advanced/Metastatic Urothelial Cancer10
Washington University, St. LouisAlzheimer Disease, Acute Myeloid Leukemia, Acute Stress Reaction10
The Washington UniversityChronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP), Back Pain, Capsular Contracture Associated With Breast Implant8
Washington University in St LouisAML, Adult, Advanced Solid Tumor, Asymptomatic Bacteriuria8
GSK Investigational SiteNon-alcoholic Fatty Liver Disease, Asthma, Gastrointestinal Neoplasms7
Washington University Medical CenterALK-Positive Lung Cancer, ALK-positive NSCLC, ALK-positive Non-small Cell Lung Cancer7
Washington University St. LouisAcute Lymphoblastic Leukemia (ALL), Acute Myelogenous Leukemia (AML or ANLL), Advanced Solid Tumors7
Saint Louis Cancer and Breast Institute-South CityMetastatic Malignant Neoplasm in the Brain, Acral Lentiginous Melanoma, Anatomic Stage IV Breast Cancer AJCC v86

Active & Upcoming Studies in St Louis (2026)

Recruiting trials in St Louis grouped by therapeutic area, drawn from ClinicalTrials.gov. Each bucket shows the most recent example studies.

Mental health & behavior (42 active studies)

Pediatric (21 active studies)

HIV / STI (12 active studies)

Vaccines (7 active studies)

Common conditions studied in St Louis

Leading research sponsors in St Louis

  • Washington University School of Medicine
  • National Cancer Institute (NCI)
  • AstraZeneca
  • Children's Oncology Group
  • Eli Lilly and Company

Frequently asked questions

How many paid clinical trials are currently recruiting in St Louis?

There are approximately 1,403 recruiting clinical trials in St Louis, Missouri listed on ClinicalTrials.gov. The number changes weekly as new studies open and others close enrollment.

Do clinical trials in St Louis pay participants?

Most recruiting trials in St Louis compensate participants for their time, travel, and study visits. Compensation varies by sponsor, study phase, and visit requirements — the exact amount is disclosed by the study team during the informed consent process.

Who can participate in a clinical trial in St Louis?

Eligibility depends on the specific study. Each trial defines its own inclusion criteria (age, diagnosis, medical history, prior treatments) and exclusion criteria. Both patients with specific conditions and healthy volunteers can qualify, depending on the study design.

What conditions are most commonly studied in St Louis?

The most common conditions under active study in St Louis include Breast Cancer (36), Prostate Cancer (31), Colorectal Cancer (22), Acute Myeloid Leukemia (20), among many others. Browse the list above to explore every recruiting trial.

Are there clinical trials for healthy volunteers in St Louis?

Yes. Healthy-volunteer studies — often early-phase pharmacology or vaccine trials — recruit in St Louis on an ongoing basis. Use the "Healthy volunteers only" filter above to view trials that accept participants without the study's target condition.

How do I enroll in a clinical trial in St Louis?

Click any study title above to see the full study record, including eligibility criteria, visit schedule, and the study team's contact information. Reach out to the central contact or recruiting site directly — they will guide you through screening and informed consent.

Where can I take part in paid clinical trials in St Louis?

Recruiting research sites in St Louis include Washington University School of Medicine, Washington University, Mercy Hospital Saint Louis, among others. Each site lists its open studies and contact information on the study record above — call or email the site coordinator to ask about screening for a specific protocol.

What kinds of studies are recruiting in St Louis right now?

The largest active categories in St Louis are Cancer & tumors (544), Neurology & pain (98), Cardiovascular (65). Use the filters above to narrow by therapeutic area, phase, age, or healthy-volunteer eligibility.

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Related healthcare resources in Missouri

Trials by condition in St Louis