#1Coastal Eye Surgeons, LLC
Serves this area from Greenwich, CT (1 mi)
Clinical Research Sites in Greenwich, CT
The top-ranked clinical research sites serving Greenwich, CT are Coastal Eye Surgeons, LLC, Greenwich Hospital and SightSera Clinical Research LLC. We list 359 clinical research sites serving Greenwich, CT. 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 Greenwich, CT (Western Connecticut Planning Region). 359 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 Greenwich
#2Greenwich Hospital
Serves this area from Greenwich, CT (1 mi)#3SightSera Clinical Research LLC
Serves this area from Greenwich, CT (1 mi)#4Smilow Cancer Hospital Care Center at Greenwich
Serves this area from Greenwich, CT (1 mi)#5Smilow Cancer Hospital - Greenwich
Serves this area from Greenwich, CT (1 mi)#6Yale New Haven Health-Greenwich Hospital
Serves this area from Greenwich, CT (1 mi)#7Smilow Cancer Hospital Care Center at Long Ridge
Serves this area from Stamford, CT (5 mi)#8Smilow Cancer Hospital - Long Ridge
Serves this area from Stamford, CT (5 mi)#9New England Institute for Neurology and Headache (NEINH)/Medical Practice
Serves this area from Stamford, CT (5 mi)#10Cardiology Associates of Fairfield County
Serves this area from Stamford, CT (5 mi)
20 more providers serving this area
- Stamford Health, Stamford, CT (5 mi)
- Stamford Hospital, Stamford, CT (5 mi)
- Stamford Hospital/Bennett Cancer Center, Stamford, CT (5 mi)
- The Stamford Hospital, Stamford, CT (5 mi)
- Cardiology Associates of Fairfield County, Stamford, CT (6 mi)
- Cardiology Associates of Fairfield County, P.C., Stamford, CT (6 mi)
- Ki Health Partners, LLC, Stamford, CT (6 mi)
- Ki Health Partners, LLc, dba New England Institute for Clinical Research, Stamford, CT (6 mi)
- New England Fertility Institute, Stamford, CT (6 mi)
- New England Institute for Clinical Research, Stamford, CT (6 mi)
- New England Institute for Clinical Research (NEICR) - Stamford, Stamford, CT (6 mi)
- Stamford Therapeutics Consortium, Stamford, CT (6 mi)
- Memorial Sloan Kettering at Westchester (Limited Protocol Activities), Harrison, NY (6 mi)
- Memorial Sloan Kettering Cancer Center, Harrison, NY (6 mi)
- Memorial Sloan Kettering Cancer Center at Westchester, Harrison, NY (6 mi)
- Memorial Sloan Kettering Cancer Center - Westchester, Harrison, NY (6 mi)
- Memorial Sloan Kettering Cancer Center Westchester, Harrison, NY (6 mi)
- Memorial Sloan Kettering Westchester, Harrison, NY (6 mi)
- Memorial Sloan Kettering Westchester, Harrison, NY (6 mi)
- Memorial Sloan Kettering Westchester (All Protocol Activities), Harrison, NY (6 mi)
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Frequently asked questions
How many clinical research sites serve Greenwich?
We list 359 clinical research sites serving Greenwich, CT: 0 based there and 359 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 Greenwich?
The top-ranked clinical research sites serving Greenwich, CT are Coastal Eye Surgeons, LLC, Greenwich Hospital, SightSera Clinical Research LLC, Smilow Cancer Hospital Care Center at Greenwich and Smilow Cancer Hospital - Greenwich. The full ranked list, with the official records each provider matched, is on this page.
Which clinical research sites serving Greenwich are verified against official records?
10 of the top 10 match an active official record: Coastal Eye Surgeons, LLC (ClinicalTrials.gov), Greenwich Hospital (ClinicalTrials.gov), SightSera Clinical Research LLC (ClinicalTrials.gov), Smilow Cancer Hospital Care Center at Greenwich (ClinicalTrials.gov) and Smilow Cancer Hospital - Greenwich (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 .