#1Advanced Medical Research
Based in La Palma, CA
Clinical Research Sites in Orange County, CA
The top-ranked clinical research sites serving Orange County, CA are Advanced Medical Research, Advanced Research Center and Allameh Medical Corp. We list 942 clinical research sites serving Orange County, 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 Orange County, CA. 942 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 Orange County
#2Advanced Research Center
Based in Anaheim, CA#3Allameh Medical Corp
Based in Mission Viejo, CA#4Allergy and Asthma Specialists Group
Based in Huntington Beach, CA#5Allergy & Asthma Associates of Southern California dba. Southern California Research
Based in Laguna Niguel, CA#6Allianz Research Institute
Based in Westminster, CA#7Altasciences Clinical LA, Inc.
Based in Cypress, CA#8Altasciences Clinical Los Angeles
Based in Cypress, CA#9AltaSciences, Inc
Based in Cypress, CA#10AME Clinical Research
Based in Huntington Beach, CA
20 more providers serving this area
- Amnova Clinical Research, LLC, Irvine, CA
- Anaheim Clinical Trials, LLC, Anaheim, CA
- A.P.J. Office, Newport Beach, CA
- Ark Clinical Research, Fountain Valley, CA
- Ark Clinical Research - Fountain Valley, Fountain Valley, CA
- Ark Clinical Research- Tustin, Fountain Valley, CA
- Arthritis & Osteoporosis Medical Center, Inc - La Palma, La Palma, CA
- Atlantis Eyecare, Huntington Beach, CA
- ATP Clinical Research, Orange, CA
- ATP Clinical Research Inc., Irvine, CA
- ATP Clinical Research, Inc., Costa Mesa, CA
- Axiom Research, Orange County, Irvine, CA
- Beckman Laser Institute and Medical Clinic, Irvine, CA
- Beckman Laser Institute Medical Clinic, Irvine, CA
- BrainHealth Solutions Inc., Costa Mesa, CA
- Cancer and Blood Specialty Clinic, Los Alamitos, CA
- Cancer and Blood Specialty Clinic (CBSC), Los Alamitos, CA
- Cancer Blood and Specialty Clinic, Los Alamitos, CA
- Cancer & Blood Research Center, Los Alamitos, CA
- Care Access - Huntington Beach, Huntington Beach, CA
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Frequently asked questions
How many clinical research sites serve Orange County?
We list 942 clinical research sites serving Orange County, CA: 268 based there and 674 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 Orange County?
The top-ranked clinical research sites serving Orange County, CA are Advanced Medical Research, Advanced Research Center, Allameh Medical Corp, Allergy and Asthma Specialists Group and Allergy & Asthma Associates of Southern California dba. Southern California Research. The full ranked list, with the official records each provider matched, is on this page.
Which clinical research sites serving Orange County are verified against official records?
10 of the top 10 match an active official record: Advanced Medical Research (ClinicalTrials.gov), Advanced Research Center (ClinicalTrials.gov), Allameh Medical Corp (ClinicalTrials.gov), Allergy and Asthma Specialists Group (ClinicalTrials.gov) and Allergy & Asthma Associates of Southern California dba. Southern California Research (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 .
Cities in Orange County
Communities served
Cypress, Brea, Rancho Santa Margarita, Stanton, San Juan Capistrano, Dana Point, Laguna Hills, Ladera Ranch, North Tustin, Seal Beach, Laguna Beach, Laguna Woods, La Palma, Coto de Caza, Los Alamitos, Rossmoor, Rancho Mission Viejo, Midway City, Las Flores, Villa Park, Trabuco Canyon, Silverado, Modjeska, Williams Canyon, El Modena, Orange Park Acres