#1Kaiser Permanente-San Marcos
Serves this area from San Marcos, CA (1 mi)
Clinical Research Sites in San Marcos, CA
The top-ranked clinical research sites serving San Marcos, CA are Kaiser Permanente-San Marcos, Kaiser Permanente San Marcos Medical Offices and California Cancer Associates for Research and Excellence. We list 319 clinical research sites serving San Marcos, CA. 30 of the providers shown match an active record from ClinicalTrials.gov, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
Clinical Research Sites serving San Marcos, CA (San Diego County). 319 providers, 10 of the top 10 verified against federal or state records. Registry records checked on 2026-11-04.
Top 10 ranked clinical research sites for San Marcos
#2Kaiser Permanente San Marcos Medical Offices
Serves this area from San Marcos, CA (1 mi)#3California Cancer Associates for Research and Excellence
Serves this area from San Marcos, CA (3 mi)#4California Cancer Associates for Research and Excellence, cCARE
Serves this area from San Marcos, CA (3 mi)#5The Neuron Clinic
Serves this area from San Marcos, CA (3 mi)#6Blue Coast Research Center, LLC
Serves this area from Vista, CA (5 mi)#7ILD Research
Serves this area from Vista, CA (5 mi)#8ILD Research Center
Serves this area from Vista, CA (5 mi)#9UC San Diego Medical Center - Vista
Serves this area from Vista, CA (5 mi)#10UCSD Medical Center - Vista
Serves this area from Vista, CA (5 mi)
20 more providers serving this area
- Coastal Research Institute, Carlsbad, CA (5 mi)
- Synexus Clinical Research US, Inc., Vista, CA (6 mi)
- California Cancer Associates for Research and Excellence, Inc. (cCare), Encinitas, CA (7 mi)
- California Cancer Associates for Research & Excellence, Inc., Encinitas, CA (7 mi)
- California Dermatology & Clinical Research Institute, Encinitas, CA (7 mi)
- CORE Orthopaedic Medical Center, Encinitas, CA (7 mi)
- North Coast Cardiology, Encinitas, CA (7 mi)
- UC San Diego Health System - Encinitas, Encinitas, CA (7 mi)
- UC San Diego Medical Center - Encinitas, Encinitas, CA (7 mi)
- UCSD Medical Center - Encinitas, Encinitas, CA (7 mi)
- Profound Research LLC, Carlsbad, CA (8 mi)
- Profound Research LLC - Carlsbad, Carlsbad, CA (8 mi)
- The Neurology Center of Southern California - Carlsbad, Carlsbad, CA (8 mi)
- Qualia Life Sciences, Carlsbad, CA (8 mi)
- UC San Diego Medical Center - Rancho Bernardo, San Diego, CA (8 mi)
- UCSD Interventional Psychiatry, San Diego, CA (8 mi)
- Dermatologist Medical Group of North County, Inc., Oceanside, CA (9 mi)
- Excell Research, Oceanside, CA (9 mi)
- Profound Research LLC, Oceanside, CA (9 mi)
- AMCR Institute, San Diego, CA (9 mi)
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Frequently asked questions
How many clinical research sites serve San Marcos?
We list 319 clinical research sites serving San Marcos, CA: 0 based there and 319 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.
Which clinical research sites serve San Marcos?
The top-ranked clinical research sites serving San Marcos, CA are Kaiser Permanente-San Marcos, Kaiser Permanente San Marcos Medical Offices, California Cancer Associates for Research and Excellence, California Cancer Associates for Research and Excellence, cCARE and The Neuron Clinic. The full ranked list, with the official records each provider matched, is on this page.
Which clinical research sites serving San Marcos are verified against official records?
10 of the top 10 match an active official record: Kaiser Permanente-San Marcos (ClinicalTrials.gov), Kaiser Permanente San Marcos Medical Offices (ClinicalTrials.gov), California Cancer Associates for Research and Excellence (ClinicalTrials.gov), California Cancer Associates for Research and Excellence, cCARE (ClinicalTrials.gov) and The Neuron Clinic (ClinicalTrials.gov), and 5 more on this page. Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.
How do sponsors judge a research site?
Common checks are enrollment history in the indication, experienced coordinators, IRB arrangements, start-up time and data quality. ClinicalTrials.gov shows which studies a site has been listed on.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .