#1Allergy & Asthma Clinical Research
Based in Walnut Creek, CA
Clinical Research Sites in Contra Costa County, CA
The top-ranked clinical research sites serving Contra Costa County, CA are Allergy & Asthma Clinical Research, BASS Cancer Center and BASS Medical Group - Lennon. We list 251 clinical research sites serving Contra Costa 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 Contra Costa County, CA. 251 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 Contra Costa County
#2BASS Cancer Center
Based in Walnut Creek, CA#3BASS Medical Group - Lennon
Based in Walnut Creek, CA#4Bay Area Retina Associates
Based in Walnut Creek, CA#5Bay Area Retina Associates, A Medical Group
Based in Walnut Creek, CA#6Bay Area Retina Associates - Walnut Creek
Based in Walnut Creek, CA#7Bay Area Retina Specialists Medical Group - Vestrum - PPDS
Based in Walnut Creek, CA#8Boomerang Healthcare
Based in Walnut Creek, CA#9Clinical Research of California LLC
Based in Walnut Creek, CA#10Contra Costa Regional Medical Center
Based in CA
20 more providers serving this area
- Diablo Clinical Research, Inc., Walnut Creek, CA
- Diablo Clinical Research, LLC dba Flourish Research, Walnut Creek, CA
- Division of Research, CA
- Doctors Medical Center- JC Robinson Regional Cancer Center, Richmond, CA
- East Bay Medical Oncology Hematology Medical Associates Inc-Pleasant Hill, Pleasant Hill, CA
- Epic Care Cyberknife Center, Walnut Creek, CA
- Infectious Disease Doctors Medical Group, APC, Walnut Creek, CA
- IPM Medical Group Inc., Walnut Creek, CA
- John Muir Clinical Research Center, Concord, CA
- John Muir Health, Walnut Creek, CA
- John Muir Health, Concord, CA
- John Muir Health Clinical Research Center, Concord, CA
- John Muir Health Clinical Research Center, Walnut Creek, CA
- John Muir Medical Center, Concord, CA
- John Muir Medical Center-Concord, Concord, CA
- John Muir Medical Center - Concord Campus, Concord, CA
- John Muir Medical Center-Walnut Creek, Walnut Creek, CA
- John Muir Medical Center - Walnut Creek Campus, Walnut Creek, CA
- John Muir Physician Network Clinical Research Center, Concord, CA
- John Muir Physician Network Clin. Research Center, Walnut Creek, CA
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Frequently asked questions
How many clinical research sites serve Contra Costa County?
We list 251 clinical research sites serving Contra Costa County, CA: 46 based there and 205 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 Contra Costa County?
The top-ranked clinical research sites serving Contra Costa County, CA are Allergy & Asthma Clinical Research, BASS Cancer Center, BASS Medical Group - Lennon, Bay Area Retina Associates and Bay Area Retina Associates, A Medical Group. The full ranked list, with the official records each provider matched, is on this page.
Which clinical research sites serving Contra Costa County are verified against official records?
10 of the top 10 match an active official record: Allergy & Asthma Clinical Research (ClinicalTrials.gov), BASS Cancer Center (ClinicalTrials.gov), BASS Medical Group - Lennon (ClinicalTrials.gov), Bay Area Retina Associates (ClinicalTrials.gov) and Bay Area Retina Associates, A Medical Group (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 Contra Costa County
Communities served
Oakley, Danville, Martinez, Pleasant Hill, San Pablo, Hercules, El Cerrito, Lafayette, Bay Point, Orinda, Pinole, Moraga, El Sobrante, Discovery Bay, Alamo, Clayton, Rodeo, Blackhawk, Contra Costa Centre, Saranap, Kensington, Tara Hills, Camino Tassajara, Vine Hill, Pacheco, North Richmond, San Miguel, East Richmond Heights, Reliez Valley, Crockett, Montalvin Manor, Rollingwood, Mountain View, Bethel Island, Bayview, Knightsen, Norris Canyon, Acalanes Ridge, Castle Hill, Diablo, Byron, Shell Ridge, Alhambra Valley, Clyde, North Gate, Port Costa