Data sourced from ClinicalTrials.gov (NIH registry) Updated weekly IRB-supervised studies only
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Updated November 2026 from ClinicalTrials.gov

Paid Clinical Trials in Fairfield, CA

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

350 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.

350studies recruiting
9+research centers nearby
5condition categories
Live from the NIH registry

Studies recruiting near Fairfield right now

Top 25 of 350 recruiting studies, sorted by proximity — each links to its official registry page

Treating Prostate Cancer That Has Come Back After Surgery With Apalutamide and Targeted Radiation Based on PET Imaging

Biochemically Recurrent Prostate Carcinoma, Metastatic Prostate Carcinoma Phase 3 Interventional 804 participants sought
BASS Medical Group - Lennon — Walnut Creek, California (24.4 mi) · Sponsor: ECOG-ACRIN Cancer Research Group
See eligibility & contact on ClinicalTrials.gov (NCT04423211)

Study of Navtemadlin as Maintenance Therapy in TP53WT Advanced or Recurrent Endometrial Cancer

Endometrial Cancer Phase 2, Phase 3 Interventional 268 participants sought
Kaiser Permanente Center — Vallejo, California (16.1 mi) · Sponsor: Kartos Therapeutics, Inc.
See eligibility & contact on ClinicalTrials.gov (NCT05797831)

Testing Shorter Duration Radiation Therapy Versus the Usual Radiation Therapy in Patients With High Risk Prostate Cancer

Prostate Adenocarcinoma, Stage III Prostate Cancer AJCC v8 Phase 3 Interventional 1,500 participants sought
Kaiser Permanente Medical Center-Vacaville — Vacaville, California (7.2 mi) · Sponsor: NRG Oncology
See eligibility & contact on ClinicalTrials.gov (NCT05946213)

A Study to Investigate Efficacy, Safety and Tolerability of Barzolvolimab Versus Placebo in Adults With Cold Induced Urticaria and Symptomatic Dermographism Inadequately Controlled by H1-antihistamines (EMBARQ - ColdU and SD)

Chronic Inducible Urticaria, Cold Urticaria Phase 3 Interventional 240 participants sought
One of a Kind Clinical Research Center — Napa, California (13.9 mi) · Sponsor: Celldex Therapeutics
See eligibility & contact on ClinicalTrials.gov (NCT07266402)

Lenalidomide, and Dexamethasone With or Without Daratumumab in Treating Patients With High-Risk Smoldering Myeloma

Smoldering Plasma Cell Myeloma Phase 3 Interventional 288 participants sought
Contra Costa Regional Medical Center — Martinez, California (17.4 mi) · Sponsor: ECOG-ACRIN Cancer Research Group
See eligibility & contact on ClinicalTrials.gov (NCT03937635)

A Study to Compare Two Surgical Procedures in Individuals With BRCA1 Mutations to Assess Reduced Risk of Ovarian Cancer

Ovarian Carcinoma N/A Interventional 1,956 participants sought
Kaiser Permanente Medical Center-Vacaville — Vacaville, California (7.2 mi) · Sponsor: NRG Oncology
See eligibility & contact on ClinicalTrials.gov (NCT04251052)

SELUTION4BTK Trial

Peripheral Arterial Disease, Chronic Limb-Threatening Ischemia Nos of Native Arteries of Extremities N/A Interventional 376 participants sought
St. Helena Hospital — St. Helena, California (29.2 mi) · Sponsor: M.A. Med Alliance S.A.
See eligibility & contact on ClinicalTrials.gov (NCT05055297)

Narrow Excision Versus Wide Excision for the Treatment of Adults With Invasive Cutaneous Melanoma, ICEMAN Trial

Clinical Stage IA Cutaneous Melanoma AJCC v8, Clinical Stage IB Cutaneous Melanoma AJCC v8 N/A Interventional 1,000 participants sought
University of California, Davis — Davis, California (25.4 mi) · Sponsor: OHSU Knight Cancer Institute
See eligibility & contact on ClinicalTrials.gov (NCT06673095)

A Study to Compare Sacituzumab Tirumotecan (MK-2870) in Combination With Pembrolizumab (MK-3475) Versus Pembrolizumab Alone as Treatment in Participants With Mismatch Repair Proficient Endometrial Cancer (MK-2870-033/TroFuse-033/GOG-3119/ENGOT-en29)

Endometrial Cancer Phase 3 Interventional 1,123 participants sought
John Muir Health Cancer Center ( Site 6028) — Walnut Creek, California (24.4 mi) · Sponsor: Merck Sharp & Dohme LLC
See eligibility & contact on ClinicalTrials.gov (NCT06952504)

Study to Evaluate Efficacy and Safety of Firmonertinib Compared With Investigator's Choice of EGFR Inhibitor as First-Line Treatment in Participants Who Have Locally Advanced or Metastatic NSCLC With EGFR P-Loop and Alpha C-Helix Compressing (PACC) Uncommon Mutations

Non-Small-Cell Lung Cancer, Metastatic Non-Small-Cell Lung Cancer Phase 3 Interventional 480 participants sought
Kaiser Permanente Medical Center — Vallejo, California (16.1 mi) · Sponsor: ArriVent BioPharma, Inc.
See eligibility & contact on ClinicalTrials.gov (NCT07185997)

A Study on the Immune Response and Safety of an Investigational Combined Measles, Mumps, Rubella and Varicella Vaccine, When Administered as Intramuscular Injection to Healthy Children 15 Months to 6 Years of Age

Measles, Measles-Mumps-Rubella+Chickenpox Vaccine Phase 3 Interventional 1,209 participants sought
GSK Investigational Site — Walnut Creek, California (24.4 mi) · Sponsor: GlaxoSmithKline
See eligibility & contact on ClinicalTrials.gov (NCT07406360)

Standard Systemic Therapy With or Without Definitive Treatment in Treating Participants With Metastatic Prostate Cancer

Castration Levels of Testosterone, Metastatic Prostatic Adenocarcinoma Phase 3 Interventional 1,273 participants sought
Kaiser Permanente Medical Center-Vacaville — Vacaville, California (7.2 mi) · Sponsor: SWOG Cancer Research Network
See eligibility & contact on ClinicalTrials.gov (NCT03678025)

A Study to Learn About How 20-Valent Pneumococcal Conjugate Vaccine Works in a Real-world Setting

Pneumonia N/A Observational 12,500 participants sought
Kaiser Permanente Walnut Creek Medical Center — Walnut Creek, California (24.4 mi) · Sponsor: Pfizer
See eligibility & contact on ClinicalTrials.gov (NCT05452941)

A Study to Assess the Safety and Efficacy of Oral Armour Thyroid Compared to Synthetic T4 for the Treatment of Primary Hypothyroidism in Adult Participants

Hypothyroidism Phase 2, Phase 3 Interventional 2,800 participants sought
John Muir Medical Center /ID# 257103 — Concord, California (19.4 mi) · Sponsor: AbbVie
See eligibility & contact on ClinicalTrials.gov (NCT06345339)

A Clinical Study of Zilovertamab Vedotin (MK-2140) Plus Rituximab Plus Cyclophosphamide, Doxorubicin, and Prednisone (R-CHP) Versus Polatuzumab Vedotin Plus R-CHP in People With Diffuse Large B-cell Lymphoma (DLBCL) (MK-2140-011/waveLINE-011)

Lymphoma, Large B-Cell, Diffuse Phase 2 Interventional 594 participants sought
Bass Medical Group ( Site 0123) — Walnut Creek, California (24.4 mi) · Sponsor: Merck Sharp & Dohme LLC
See eligibility & contact on ClinicalTrials.gov (NCT06890884)

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)

A Study to Assess Efficacy and Safety of KarXT for the Treatment of Psychosis Associated With Alzheimer's Disease (ADEPT-2)

Psychosis Associated With Alzheimer's Disease Phase 3 Interventional 500 participants sought
Local Institution - 1007 — Walnut Creek, California (24.4 mi) · Sponsor: Karuna Therapeutics, Inc., a Bristol Myers Squibb company
See eligibility & contact on ClinicalTrials.gov (NCT06126224)

Evaluation of Efficacy and Safety of Suzetrigine for Pain Associated With Diabetic Peripheral Neuropathy

Diabetic Peripheral Neuropathic Pain Phase 3 Interventional 1,100 participants sought
Diablo Clinical Research (DCR) — Walnut Creek, California (24.4 mi) · Sponsor: Vertex Pharmaceuticals Incorporated
See eligibility & contact on ClinicalTrials.gov (NCT06628908)

Phase 4 Study: Long-term Safety and Efficacy of NT-501 in MacTel Type 2, Including Sham Procedure Participants

Macular Telangiectasia Type 2 (MacTel) Phase 4 Interventional 234 participants sought
Bay Area Retina Associates — Walnut Creek, California (24.4 mi) · Sponsor: Neurotech Pharmaceuticals
See eligibility & contact on ClinicalTrials.gov (NCT06971939)
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.

See which clinical studies you may qualify for

A partner research network matches volunteers with studies that are currently enrolling in the United States. You answer a few screening questions about your health and where you live; if a study looks like a fit, its team contacts you to confirm eligibility.

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 350 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 & Oncology13 studies
  • Liver & Kidney2 studies
  • Diabetes & Metabolism2 studies
  • Heart & Vascular1 studies
  • Brain & Mental Health1 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, CA1,509 Concord, CA1,522 Antioch, CA463 Oakland, CA2,260 Hayward, CA2,274 Sacramento, CA642 San Francisco, CA2,240 Elk Grove, CA631

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 Beach3,380 Fullerton3,269 Torrance3,260 Anaheim3,212 Garden Grove3,202 Pomona3,169 Glendale2,968 Los Angeles2,945 Huntington Beach2,870 Santa Clarita2,368 Hayward2,274 Fremont2,265

New paid studies open every week

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