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ClinicalTrials.gov 24,857 recruiting now free trial finder

Find a clinical trial that's recruiting now

Search 24,857 actively recruiting US clinical trials by condition, drug, or state, each entry links straight to its NIH ClinicalTrials.gov record so you can check eligibility and contact the study team.

24,857
trials recruiting now
14%
of all US trials open to enrollment
52
states with recruiting sites

A trial is listed as recruiting when its sponsor has marked it open to new participants on the public registry. Type a condition or drug name (for example, "breast cancer" or "pembrolizumab") to narrow the list, and add a state to find studies with a site near you. Results are ordered with the most relevant recruiting studies first; each card shows the study phase and enrollment target, and opens the full record, including eligibility criteria and contact details, on ClinicalTrials.gov.

Showing the 40 largest recruiting trials by target enrollment in Illinois. Use the search field to focus on a condition or drug.

Recruiting 5,000,000 participants

The Pediatric Anesthesia Quality Improvement Project

The Society for Pediatric Anesthesia

NCT00674388

Recruiting 3,000,000 participants

Delivery Room Intervention and Evaluation Network

American Academy of Pediatrics

NCT06803498

Recruiting 500,000 participants

American Joint Replacement Registry

American Joint Replacement Registry

NCT01909375

Recruiting 200,000 participants

Connect for Cancer Prevention Study (Connect)

National Cancer Institute (NCI)

NCT04609072

Recruiting 150,000 participants

Improving Safety and Quality of Tracheal Intubation Practice in Pediatric ICUs

Children's Hospital of Philadelphia

NCT02493478

Recruiting 120,000 participants

End Diagnostic Overshadowing:Addressing Ableism in Diagnoses

Rush University Medical Center

NCT06608758

Recruiting 120,000 participants

Computerized Registry of Patients With Venous Thromboembolism (RIETE)

Manuel Monreal

NCT02832245

Recruiting 100,000 participants

US National OCS Heart Perfusion (OHP) Registry

TransMedics

NCT05915299

Recruiting 100,000 participants

Protocol for Collecting, Banking and Distributing Human Tissue Samples: St. Jude Children's Research Hospital Tissue Resources Core Facility

St. Jude Children's Research Hospital

NCT01354002

Recruiting 100,000 participants

Caris Biorepository Research Protocol

Caris Science

NCT01499394

Recruiting NA 100,000 participants

Women Informed to Screen Depending on Measures of Risk (Wisdom Study)

University of California, San Francisco

NCT02620852

Recruiting 100,000 participants

AnovaOS Network Powered Patient Registry

Anova Enterprises

NCT05013944

Recruiting 80,000 participants

Generic Database of Very Low Birth Weight Infants

NICHD Neonatal Research Network

NCT00063063

Recruiting 68,000 participants

Follow-up Visit of High Risk Infants

NICHD Neonatal Research Network

NCT00009633

Recruiting 60,000 participants

SVS VQI TransCarotid Revascularization Surveillance Project

Society for Vascular Surgery Patient Safety Organization

NCT02850588

Recruiting 50,000 participants

Childhood Cancer Survivor Study

St. Jude Children's Research Hospital

NCT01120353

Recruiting NA 45,257 participants

Primary Care Detection of Cognitive Impairment Leveraging Health & Consumer Technologies in Underserved Communities: The MyCog Trial

Northwestern University

NCT05607732

Recruiting 40,000 participants

Stroke Thrombectomy and Aneurysm Registry

Medical University of South Carolina

NCT04994756

Recruiting 40,000 participants

Registry Study for Radiation Therapy Outcomes

Proton Collaborative Group

NCT01255748

Recruiting NA 36,503 participants

Supraglottic Airway for Resuscitation Trial

Children's Hospital of Philadelphia

NCT07150923

Recruiting 35,000 participants

Enroll -HD: A Prospective Registry Study in a Global Huntington's Disease Cohort

CHDI Foundation

NCT01574053

Recruiting 30,000 participants

Pancreatic Cancer Detection Consortium (PCDC) Prospective Cohorts

Mayo Clinic

NCT06271291

Recruiting 30,000 participants

Effectiveness of an Automated Falls-Risk Screening and Referral Tool in the Emergency Department (ED)

University of Wisconsin, Madison

NCT05810064

Recruiting 25,000 participants

Parkinson's Foundation PD GENEration Genetic Registry

Parkinson's Foundation

NCT04994015

Recruiting 25,000 participants

Falcon Real World Evidence Registry

Exact Sciences Corporation

NCT06589310

Recruiting NA 22,000 participants

The INFLUENTIAL Trial- Evaluation of National Inpatient Influenza Vaccination Program

University of Colorado, Denver

NCT05832307

Recruiting 20,000 participants

Observational Study of Pediatric Rheumatic Diseases: The CARRA Registry

Duke University

NCT02418442

Recruiting 20,000 participants

Clinical and Genetic Evaluation of Individuals With Undiagnosed Disorders Through the Undiagnosed Diseases Network

National Human Genome Research Institute (NHGRI)

NCT02450851

Recruiting 20,000 participants

Alzheimer's National Registry for Treatment and Diagnostics(ALZ-NET)

Alzheimer's Disease and Related Disorders Association

NCT06170268

Recruiting 20,000 participants

Clinical Validation of Freenome Multiomics Blood Test for Lung Cancer Screening

Freenome Holdings

NCT06122077

Recruiting 20,000 participants

A Prospective Registry to Enable Collection of Standardized Routine Care Oncology Patient Data

N-Power Medicine

NCT06877884

Recruiting 20,000 participants

Pancreatic Cancer Early Detection Consortium

Arbor Research Collaborative for Health

NCT04970056

Recruiting Phase 3 20,000 participants

Randomized, Embedded, Multifactorial Adaptive Platform Trial for Community- Acquired Pneumonia

UMC Utrecht

NCT02735707

Recruiting 20,000 participants

Exactech Shoulder Post Market Clinical Follow-up Study

Exactech

NCT05603728

Recruiting 19,331 participants

Examining Digital Health Care Delivery Models Through Medicaid Collaborative

OSF Healthcare System

NCT05555095

Recruiting NA 17,000 participants

Patient Outcome Reporting for Timely Assessments of Life With Post-Traumatic Stress Disorder

University of Chicago

NCT06479447

Recruiting 14,000 participants

Multi-Center Registry for Peripheral Arterial Disease Interventions and Outcomes

Baylor Research Institute

NCT01904851

Recruiting 12,000 participants

The Myelin Disorders Biorepository Project

Children's Hospital of Philadelphia

NCT03047369

Recruiting Phase 3 11,000 participants

EASi-KIDNEY™ (The Studies of Heart & Kidney Protection With BI 690517 in Combination With Empagliflozin)

Boehringer Ingelheim

NCT06531824

Recruiting Phase 4 10,742 participants

Effectiveness of Two Aspirin Doses for Prevention of Hypertensive Disorders of Pregnancy: ASPIRIN TRIAL

Ohio State University

NCT06468202

Source: ClinicalTrials.gov (NIH/NLM) ClinicalTrials.gov AACT registry · 2026 Recruiting status is reported by each study's sponsor and mirrored from the public registry. Always confirm current eligibility and status on ClinicalTrials.gov before contacting a study.

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