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Washington Paid Clinical Trials
A listing of 1729 clinical trials in Washington actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
1009 - 1020 of 1729
Washington is currently home to 1729 active clinical trials, seeking participants for engagement in research studies. These trials take place at a variety of cities in the state, including Seattle, Spokane, Tacoma and Vancouver. Whether you're a healthy volunteer interested in paid medical research or someone seeking trials related to a specific condition, the state offers a diverse array of opportunities in your vicinity.
Featured Trial
Healthy Participants Needed (Colonoscopy + Cancer Screening)
Recruiting
Earn $325 - $475 in electronic payment card compensation for your time and effort by participating in a clinical study to develop a blood test that may one day help screen for colon cancer. Take a quick quiz to see if you qualify.
Conditions:
Healthy
Healthy Volunteers
Healthy Subjects
Healthy Volunteer
Healthy Participants
Featured Trial
Paid Clinical Studies Nationwide
Recruiting
Nationwide clinical trials offered in your area. Some trials offering up to several thousand dollars in compensation for participation.
Conditions:
Healthy
Healthy Volunteer Study
Featured Trial
Buy Retatrutide Online Through Celia
Recruiting
Retatrutide (formerly M25) is an investigational peptide being studied for its potential in supporting weight management and metabolic health. It acts on GLP-1, GIP, and glucagon receptors to influence appetite, energy regulation, and fat metabolism.
Conditions:
Healthy
Featured Offer
Find the Best GLP-1 Weight Loss Providers (2025)
Recruiting
Cutting-edge GLP-1 treatments like semaglutide and tirzepatide are helping thousands lose weight with medically guided support. But with so many online providers, how do you know which programs are trusted, affordable, and right for you?
We reviewed the top GLP-1 brands of 2025 — comparing pricing, prescription process, shipping, pharmacy partners, and real user ratings — to help you find a safe, convenient, and effective path toward your weight-loss goals.
- 100% online programs
- Licensed U.S. clinicians
- Fast shipping & flexible payments
See the rankings & choose the GLP-1 provider that fits your life.
We reviewed the top GLP-1 brands of 2025 — comparing pricing, prescription process, shipping, pharmacy partners, and real user ratings — to help you find a safe, convenient, and effective path toward your weight-loss goals.
- 100% online programs
- Licensed U.S. clinicians
- Fast shipping & flexible payments
See the rankings & choose the GLP-1 provider that fits your life.
Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
Featured Trial
Depression Clinical Trial
Recruiting
Join us in researching a potential investigational treatment for Depression. Reimbursement for study-related expenses may be available to you.
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Conditions:
Depression
Major Depressive Disorder
Depressive Disorder
Depressive Symptoms
Depressive Disorder
Building Research for Intervention Development in Gliosis and Eating Habits
Recruiting
The goal of this study is to 1) use magnetic resonance imaging (MRI) to evaluate the effect of nutritious foods on inflammation in the human hypothalamus of children and 2) assess the feasibility and acceptability of nutritious food feeding intervention strategies in children with overweight or obesity.
Gender:
ALL
Ages:
9 years and above
Trial Updated:
06/05/2025
Locations: University of Washington, Seattle, Washington
Conditions: Gliosis, Child Obesity, Eating
ReNEW:Phase 3 Study of Efficacy, Safety & Pharmacokinetics of Subcutaneous Injections of Elamipretide in Subjects With Dry Age-Related Macular Degeneration (Dry AMD)
Recruiting
The goal of this clinical trial is to evaluate the efficacy, safety and pharmacokinetics of elamipretide in subjects with dry age-related macular degeneration (AMD). The main questions it aims to answer are: what is the rate of change in the macular area of photoreceptor loss in subjects who receive a daily dose of elamipretide compared with those who receive a look-alike substance that contains no active drug, and what is the safety and tolerability of elamipretide daily subcutaneous injections... Read More
Gender:
ALL
Ages:
55 years and above
Trial Updated:
06/05/2025
Locations: Pacific Northwest Retina, PLLC, Silverdale, Washington
Conditions: Age Related Macular Degeneration (ARMD)
Neoadjuvant Chemotherapy, Excision And Observation vs Chemoradiotherapy For Rectal Cancer
Recruiting
This study is being done to answer the following questions: Is the chance of rectal cancer responding the same if chemotherapy alone is given before limited surgery compared to chemotherapy and radiation therapy given together before limited surgery? If radiation therapy is not given, is quality of life better?
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/05/2025
Locations: Virginia Mason Medical Center, Seattle, Washington
Conditions: Rectal Cancer
Collaborative Care for Polysubstance Use in Primary Care Settings (Co-Care)
Recruiting
The purpose of this trial is to test the efficacy of a collaborative care intervention to address opioid- and/or stimulant-involved polysubstance use in adult primary care patients with moderate to severe substance use disorders (SUD). The primary aims are to reduce days of opioid use (illicit or nonmedical opioid use), days of illicit stimulant use (cocaine, methamphetamine), and days of heavy alcohol use.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/05/2025
Locations: Sea Mar Community Health Centers, Bellingham, Washington
Conditions: Substance Use
Study of AMG 509 in Participants With Metastatic Castration-Resistant Prostate Cancer
Recruiting
Evaluate the safety and tolerability of AMG 509 in adult participants and determine the maximum tolerated dose (MTD) or recommended phase 2 dose (RP2D).
Part 2 is now closed to accrual.
Gender:
MALE
Ages:
18 years and above
Trial Updated:
06/05/2025
Locations: Fred Hutchinson Cancer Center, Seattle, Washington
Conditions: Prostate Cancer
HCRN Endoscopic Versus Shunt Treatment of Hydrocephalus in Infants
Recruiting
Hydrocephalus is a potentially debilitating neurological condition that primarily affects babies under a year of age and has traditionally been treated by inserting a shunt between the brain and the abdomen. A newer endoscopic procedure offers hope of shunt- free treatment that may reduce complications over a child's life, but it is not clear if the endoscopic procedure results in similar intellectual outcome as shunt. Therefore, the investigators propose a randomized trial to compare intellectu... Read More
Gender:
ALL
Ages:
Between 1 day and 104 weeks
Trial Updated:
06/05/2025
Locations: Seattle Children's Hospital, Seattle, Washington
Conditions: Hydrocephalus
Ivosidenib Plus Durvalumab and Gemcitabine/Cisplatin as First-Line Therapy in Participants With Locally Advanced or Metastatic Cholangiocarcinoma With an IDH1 Mutation
Recruiting
The objective of this study is to investigate the safety, tolerability and preliminary activity of ivosidenib in combination with durvalumab and gemcitabine/cisplatin as first-line therapy in participants with locally advanced, unresectable or metastatic cholangiocarcinoma with an IDH1 mutation. The study will begin with a safety lead-in phase (Phase 1b study) to determine the recommended combination dose (RDC) and then will transition to an expansion phase (Phase 2 study) to assess the clinical... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/04/2025
Locations: Fred Hutchinson Cancer Center, Seattle, Washington
Conditions: Locally Advanced, Unresectable or Metastatic Cholangiocarcinoma With an IDH1 Mutation
A Study to Evaluate the Efficacy and Safety of Pegozafermin in Participants With Compensated Cirrhosis Due to MASH
Recruiting
The study will assess the efficacy and safety of pegozafermin administered in participants with compensated cirrhosis due to MASH (biopsy-confirmed fibrosis stage F4 MASH \[previously known as nonalcoholic steatohepatitis, NASH\]).
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
06/04/2025
Locations: 89bio Clinical Study Site, Seattle, Washington
Conditions: Metabolic Dysfunction-Associated Steatohepatitis (MASH) / Nonalcoholic Steatohepatitis (NASH) With Compensated Cirrhosis
Observational Study Protocol: LIVER-R
Recruiting
Given the number of anticipated durvalumab-based treatment launches in the hepatobiliary cancer space over the next 3 years, there is a need to capture contemporary real-world data across these indications. LIVER-R is a multicountry, multicenter, observational study of patients with a confirmed diagnosis of hepatobiliary cancer treated with a durvalumab-based regimen as part of routine clinical practice or early access program (EAP). The study design will include primary and secondary data colle... Read More
Gender:
ALL
Ages:
Between 18 years and 130 years
Trial Updated:
06/04/2025
Locations: Research Site, Spokane, Washington
Conditions: Hepatobiliary Cancers
Maintenance Obinutuzumab in Treating Patients With Central Nervous System Lymphoma Who Have Achieved a Complete or Partial Response
Recruiting
This randomized phase II trial studies how well obinutuzumab works as maintenance treatment in patients with central nervous system lymphoma who have achieved the disappearance of all signs of cancer in response to treatment (complete response) or a decrease in the size of a tumor, or in the extent of cancer in the body, in response to treatment (partial response). Immunotherapy with obinutuzumab, may induce changes in body's immune system and may interfere with the ability of tumor cells to gro... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/04/2025
Locations: Ivy Center for Advanced Brain Tumor Treatment; Swedish Neuroscience Institute, Seattle, Washington
Conditions: Primary Central Nervous System Lymphoma
A Proof-of-Concept Study to Learn Whether Linvoseltamab Can Eliminate Abnormal Plasma Cells That May Lead to Multiple Myeloma in Adult Patients With High-Risk Monoclonal Gammopathy of Undetermined Significance or Non-High-Risk Smoldering Multiple Myeloma
Recruiting
The primary purpose of the study is to understand how well the study drug can eliminate abnormal plasma cells and laboratory signs of high-risk monoclonal gammopathy of undetermined significance (HR-MGUS) and non high-risk smoldering multiple myeloma (NHR-SMM). This requires understanding the safety and tolerability of the study drug (how the body reacts to linvoseltamab) as well as the effectiveness of the study drug (how well linvoseltamab eliminates plasma cells). All participants will start... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/04/2025
Locations: University of Washington, Seattle, Washington
Conditions: Monoclonal Gammopathy of Undetermined Significance (MGUS), Smoldering Multiple Myeloma (SMM)
TRIcvalve biCAVal Valve System for Severe Tricuspid Regurgitation (TRICAV-I)
Recruiting
The TricValve® Transcatheter Bicaval Valve System is a bicaval transcatheter tricuspid valve replacement system, which includes the TricValve® Transcatheter Bicaval Valve for superior vena cava (SVC) and the TricValve® Transcatheter Bicaval Valve for inferior vena cava (IVC). The TricValve® Transcatheter Bicaval Valves are pre-mounted into the TricValve® Delivery System which is used for percutaneous access and delivery of the TricValve® Transcatheter Bicaval Valve in the vena cava. The system i... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/04/2025
Locations: MedStar Washington Hospital Center, Multiple Locations, Washington
Conditions: Tricuspid Regurgitation, Tricuspid Valve Disease
