Data sourced from ClinicalTrials.gov (NIH registry) Updated weekly IRB-supervised studies only
Home/CA/Fairfield
Updated August 2026 from ClinicalTrials.gov

Paid Clinical Trials in Fairfield, CA

Studies commonly pay $75 to $4,500 per completed study

348 clinical trials are currently recruiting participants within 30 miles of Fairfield. Listings below come straight from the official NIH registry, alongside the area's top-rated research centers with real Google reviews.

348studies recruiting
9+research centers nearby
5condition categories
Live from the NIH registry

Studies recruiting near Fairfield right now

Top 25 of 348 recruiting studies, sorted by proximity — each links to its official registry page

Lung-MAP: A Master Screening Protocol for Previously-Treated Non-Small Cell Lung Cancer

Previously Treated Non-Small Cell Lung Cancer Phase 2, Phase 3 Interventional 10,000 participants sought
Northbay Cancer Center — Vacaville, California (7.2 mi) · Sponsor: SWOG Cancer Research Network
See eligibility & contact on ClinicalTrials.gov (NCT03851445)

MMA Embolization for Refractory Chronic Migraine

Migraine Disorders N/A Interventional 70 participants sought
John Muir Physician Network Clin. Research Center — Walnut Creek, California (24.4 mi) · Sponsor: Cerenovus, Part of DePuy Synthes Products, Inc.
See eligibility & contact on ClinicalTrials.gov (NCT06735833)

Phase 3 Study of RLY-2608 + Fulvestrant vs Capivasertib + Fulvestrant as Treatment for Locally Advanced or Metastatic PIK3CA-mutant HR+/HER2- Breast Cancer

PIK3CA Mutation, HER2- Negative Breast Cancer Phase 3 Interventional 540 participants sought
Kaiser Permanente Medical Center — Vallejo, California (16.1 mi) · Sponsor: Relay Therapeutics, Inc.
See eligibility & contact on ClinicalTrials.gov (NCT06982521)

A Long-term Extension Study of JNJ-81201887 (AAVCAGsCD59) Parent Studies in Participants With Geographic Atrophy (GA) Secondary to Age-related Macular Degeneration (AMD)

Geographic Atrophy, Macular Degeneration Phase 2 Interventional 274 participants sought
Bay Area Retina Associates — Walnut Creek, California (24.4 mi) · Sponsor: Janssen Research & Development, LLC
See eligibility & contact on ClinicalTrials.gov (NCT06635148)

A Study of Oral Atogepant Tablets to Assess Adverse Events and Change in Disease Activity To Prevent Migraine in Participants Aged 12 to 17 Years

Chronic Migraine Phase 3 Interventional 420 participants sought
Sunwise Clinical Research /ID# 270431 — Walnut Creek, California (24.4 mi) · Sponsor: AbbVie
See eligibility & contact on ClinicalTrials.gov (NCT06810505)

A Study to Compare Standard Therapy to Treat Hodgkin Lymphoma to the Use of Two Drugs, Brentuximab Vedotin and Nivolumab

Lugano Classification Limited Stage Hodgkin Lymphoma AJCC v8 Phase 3 Interventional 1,875 participants sought
Kaiser Permanente-Vallejo — Vallejo, California (16.1 mi) · Sponsor: National Cancer Institute (NCI)
See eligibility & contact on ClinicalTrials.gov (NCT05675410)

A Study of Nemtabrutinib (MK-1026) Versus Comparator (Investigator's Choice of Ibrutinib or Acalabrutinib) in First Line (1L) Chronic Lymphocytic Leukemia (CLL)/ Small Lymphocytic Lymphoma (SLL) (MK-1026-011/BELLWAVE-011)

Chronic Lymphocytic Leukemia, Small Lymphocytic Lymphoma Phase 3 Interventional 1,200 participants sought
Alta Bates Summit Medical Center ( Site 0004) — Berkeley, California (29.7 mi) · Sponsor: Merck Sharp & Dohme LLC
See eligibility & contact on ClinicalTrials.gov (NCT06136559)

A Research Study Investigating How Well the Medicine NNC0487-0111 Helps People With Excess Body Weight and Knee Osteoarthritis Lose Weight and Reduce Pain

Obesity, Knee Osteoarthritis (OA) Phase 3 Interventional 400 participants sought
Diablo Clinical Research, Inc. — Walnut Creek, California (24.4 mi) · Sponsor: Novo Nordisk A/S
See eligibility & contact on ClinicalTrials.gov (NCT07481630)

A Study to Assess the Adverse Events and Change in Disease Activity of Oral Atogepant Tablets in Pediatric Participants (6-17 Years of Age) With Episodic Migraine

Episodic Migraine Phase 3 Interventional 450 participants sought
Sunwise Clinical Research /ID# 248529 — Walnut Creek, California (24.4 mi) · Sponsor: AbbVie
See eligibility & contact on ClinicalTrials.gov (NCT05711394)

Sacituzumab Tirumotecan (MK-2870) Plus Pembrolizumab Versus TPC in TNBC Who Did Not Achieve pCR (MK-2870-012)

Triple-Negative Breast Cancer Phase 3 Interventional 1,530 participants sought
Kaiser Permanente Vallejo Medical Center ( Site 0060) — Vallejo, California (16.1 mi) · Sponsor: Merck Sharp & Dohme LLC
See eligibility & contact on ClinicalTrials.gov (NCT06393374)

Comparing Combinations of Drugs to Treat Newly Diagnosed Multiple Myeloma (NDMM) When a Stem Cell Transplant is Not a Medically Suitable Treatment

Plasma Cell Myeloma Phase 3 Interventional 510 participants sought
Providence Queen of The Valley — Napa, California (13.9 mi) · Sponsor: SWOG Cancer Research Network
See eligibility & contact on ClinicalTrials.gov (NCT05561387)

MYELOMATCH: A Screening Study to Assign People With Myeloid Cancer to a Treatment Study or Standard of Care Treatment Within myeloMATCH (MyeloMATCH Screening Trial)

Acute Myeloid Leukemia, Acute Myeloid Leukemia Arising From Previous Myelodysplastic/Myeloproliferative Neoplasm Phase 2 Interventional 2,000 participants sought
Kaiser Permanente-Vallejo — Vallejo, California (16.1 mi) · Sponsor: National Cancer Institute (NCI)
See eligibility & contact on ClinicalTrials.gov (NCT05564390)

A Study to Learn About the Study Medicine Called Rimegepant in Women When Used for Intermittent Prevention of Menstrual Migraine

Menstrual Migraine Phase 3 Interventional 723 participants sought
Diablo Clinical Research, Inc. — Walnut Creek, California (24.4 mi) · Sponsor: Pfizer
See eligibility & contact on ClinicalTrials.gov (NCT06641466)

AMAZE 12: A Research Study Investigating How Well the Medicine NNC0487-0111 Helps People With Excess Body Weight Maintain Their Weight Loss

Obesity Phase 3 Interventional 600 participants sought
Diablo Clinical Research, Inc. — Walnut Creek, California (24.4 mi) · Sponsor: Novo Nordisk A/S
See eligibility & contact on ClinicalTrials.gov (NCT07503210)

Testing the Addition of High Dose, Targeted Radiation to the Usual Treatment for Locally-Advanced Inoperable Non-Small Cell Lung Cancer

Locally Advanced Lung Non-Small Cell Carcinoma, Stage IIB Lung Cancer AJCC v8 Phase 3 Interventional 474 participants sought
Sutter Solano Medical Center/Cancer Center — Vallejo, California (16.1 mi) · Sponsor: NRG Oncology
See eligibility & contact on ClinicalTrials.gov (NCT05624996)

A Study of Donanemab (LY3002813) in Participants Who Completed Study AACM (TRAILBLAZER-ALZ 3-EXT).

Alzheimer Disease, Dementia Phase 3 Interventional 550 participants sought
Infectious Disease Doctors Medical Group, APC — Walnut Creek, California (24.4 mi) · Sponsor: Eli Lilly and Company
See eligibility & contact on ClinicalTrials.gov (NCT07602582)

S1703 Serum Tumor Marker Directed Disease Monitoring in Patients With Hormone Receptor Positive Her2 Negative Metastatic Breast Cancer

Anatomic Stage IV Breast Cancer AJCC v8, Estrogen Receptor Positive N/A Interventional 739 participants sought
Providence Queen of The Valley — Napa, California (13.9 mi) · Sponsor: SWOG Cancer Research Network
See eligibility & contact on ClinicalTrials.gov (NCT03723928)

Phase III, Open-label Study of First-line Osimertinib With or Without Datopotamab Deruxtecan for EGFRm Locally Advanced or Metastatic Non-small Cell Lung Cancer

Non-small Cell Lung Cancer Phase 3 Interventional 582 participants sought
Research Site — Walnut Creek, California (24.4 mi) · Sponsor: AstraZeneca
See eligibility & contact on ClinicalTrials.gov (NCT06350097)

A Study to Evaluate the Efficacy of AXS-05 Compared to Bupropion in Preventing the Relapse of Depressive Symptoms

Major Depressive Disorder Phase 4 Interventional 350 participants sought
Clinical Research Site — Lafayette, California (26.1 mi) · Sponsor: Axsome Therapeutics, Inc.
See eligibility & contact on ClinicalTrials.gov (NCT06223880)

Testing Olaparib for One or Two Years, With or Without Bevacizumab, to Treat Ovarian Cancer

Fallopian Tube Endometrioid Adenocarcinoma, Fallopian Tube High Grade Serous Adenocarcinoma Phase 3 Interventional 880 participants sought
Kaiser Permanente Medical Center-Vacaville — Vacaville, California (7.2 mi) · Sponsor: NRG Oncology
See eligibility & contact on ClinicalTrials.gov (NCT06580314)
Actively enrolling

Studies you may be able to join near Fairfield

These studies are recruiting through partner research networks. We may be paid a referral fee if you complete their screening form — this never changes what you pay (nothing) or the compensation the study offers you.

Research study for alcohol-related liver damage

Enrolling US adults aged 18 to 70 with alcohol-induced liver damage and a history of heavy drinking. Not open to people with a recent stroke, heart attack, dialysis, or who take blood thinners.

Screening is free and takes a few minutes. Eligibility and any compensation are confirmed by the study team, not by this site.

Check your eligibility

Research studies for chronic kidney disease

This research platform is enrolling Black and African American adults in eligible areas who have been diagnosed with chronic kidney disease. Compensation may be available. The study team confirms eligibility before enrollment.

Screening is free and takes a few minutes. Eligibility and any compensation are confirmed by the study team, not by this site.

Check your eligibility

Research study for bladder problems after spinal cord injury

This study is enrolling US adults aged 18 to 75 living with chronic involuntary bladder leakage caused by a spinal cord injury, for research including investigational gene therapy approaches. The study team confirms eligibility and any compensation before enrollment.

Screening is free and takes a few minutes. Eligibility and any compensation are confirmed by the study team, not by this site.

Check your eligibility
Google-rated

Top-rated research centers in Fairfield

Dedicated clinical research sites near you — with their real Google ratings, reviews and contact details

Pacific Clinics

★ 1.0
2420 Martin Rd Ste 200, Fairfield, CA 94534
(707) 428-4198
"One of your service mobile blocking my way to get my boat out. Vehicle #68"
— James Pena, 1★

John Muir Health Clinical Research Center

2700 Grant St #102, Concord, CA 94520
(925) 674-2580

Clinical Research of California

1399 Ygnacio Valley Rd #11c, Walnut Creek, CA 94598

Metabolic Research Center - Touro University California

★ 5.0
89 Cossey St, Vallejo, CA 94592
(707) 638-5303

Sunwise Clinical Research

★ 4.7
1371 Oakland Blvd #301, Walnut Creek, CA 94596
(925) 298-5147
"They are a great group of people"
— Tree Sap, 5★

California Institute of Research and Technology LLC

★ 5.0
5663 Marden St #108, Davis, CA 95618
(530) 702-8144
"My experience with CIRTS has been wonderful and it was a pleasure learning from Dr. Burney. He is very knowledgeable in his field and he provided a l…"
— Yayra Torkornoo, 5★

Clinical Trials Research

★ 5.0
3750 Auburn Blvd Ste A, Sacramento, CA 95821
(916) 487-8230
"I asked for a business location and it popped right up."
— Barbara McGarvey, 5★

UC Davis Health - Participate in Clinical Trials

2921 Stockton Blvd, Sacramento, CA 95817
(855) 823-1660

Neurovations Research

★ 3.3
3444 Valle Verde Dr, Napa, CA 94558
(707) 252-9606
"Got my test shot for pain pump and I haven't felt pain yet"
— Aaron Kane, 5★

Clinical trials in Fairfield: what's recruiting

The Fairfield area currently has 348 studies open to new participants, according to the ClinicalTrials.gov registry maintained by the U.S. National Institutes of Health. Among the studies closest to Fairfield, the most active research areas are:

  • Cancer & Oncology12 studies
  • Diabetes & Metabolism2 studies
  • Brain & Mental Health2 studies
  • Liver & Kidney1 studies
  • Immune & Skin1 studies

Every listing shows the study phase, the recruiting site and its distance from Fairfield, and links to the official registry page where eligibility criteria and study contacts are published. Compensation is set by each sponsor: industry surveys report typical payments of $75 to $4,500 per completed study, with short observational studies at the low end and multi-visit or overnight Phase 1 studies at the high end.

How to enroll in a paid study in Fairfield

Start with a study whose condition matches your profile — or a healthy-volunteer study if you have no diagnosis. Contact the research site through the registry page, complete a short phone screen, then attend an in-person screening visit. If you qualify, the study team walks you through the informed consent document, which details every procedure, risk and payment before you commit. You can withdraw at any point, and enrollment is always free.

Fairfield participants can also register with the dedicated research centers listed above — many maintain volunteer databases and call when a matching study opens — or sign up for our email alert below to hear when a new study starts recruiting within 30 miles of your ZIP code.

Frequently asked questions

How much do paid clinical trials in Fairfield pay?
Compensation varies by study length, procedures and overnight stays. Industry surveys report typical payments from $75 to $4,500 per completed study, with simple observational studies at the low end and multi-week inpatient Phase 1 studies at the high end. Each listing's study team will confirm the exact amount before you enroll.
Do I need to be sick to join a clinical trial in Fairfield?
No. Many studies recruit healthy volunteers, especially early-phase studies run at dedicated research centers. Others need participants diagnosed with a specific condition. Every trial lists its eligibility criteria — age range, condition, medications — and the study team screens you before enrollment.
Are clinical trials in Fairfield safe?
Every trial on this page is registered on ClinicalTrials.gov, the official NIH registry, and is overseen by an Institutional Review Board (IRB). Before joining you receive an informed consent document detailing procedures, risks and compensation. Participation is voluntary and you can withdraw at any time.
How do I join a study in Fairfield, CA?
Pick a study that matches your profile, contact the research site (or apply through the study links on this page), pass a phone pre-screen, then attend an in-person screening visit. If you qualify, you review and sign the informed consent and the study begins. The process typically takes 1-3 weeks.
What is the difference between a research center and a hospital study in Fairfield?
Dedicated research centers (listed on this page with their Google ratings) run studies as their core business — often healthy-volunteer and vaccine studies with structured compensation. Hospital and university studies tend to focus on patients with specific conditions. Both types are registered and IRB-supervised.

Paid clinical trials near Fairfield

Other metros within reach

Vallejo, CA1,505 Concord, CA1,513 Antioch, CA449 Oakland, CA2,257 Hayward, CA2,266 Sacramento, CA633 San Francisco, CA2,236 Elk Grove, CA625

By condition

Eligibility and exclusions, condition by condition

Alcoholic Liver Disease in Fairfield Chronic Kidney Disease (HealthMatch) in Fairfield Bladder Issues Due To Spinal Cord Injury in Fairfield All conditions

More of CA

Long Beach3,348 Torrance3,239 Fullerton3,230 Anaheim3,164 Garden Grove3,162 Pomona3,123 Glendale2,948 Los Angeles2,936 Huntington Beach2,847 Santa Clarita2,389 Hayward2,266 Oakland2,257

New paid studies open every week

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