Company lists · Data refreshed September 2026

Top 25 Phase one clinical trial sites based in the United States

RevenueBase identified 66 company matches for phase one clinical trial sites associated with the United States as of September 2026 and tracks 1,095 professional contacts across them, including 290 with verified work emails. Miami is the largest hub.

This list covers company matches for phase one clinical trial sites associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built
66Companies
1,095Contacts tracked
290Verified emails
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The 25 largest phase one clinical trial sites based in the United States

Ranked by team size
Top 25 of 66 company matches for phase one clinical trial sites based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Antonio, TX, United StatesHQ recorded Sep 17, 2026501-1,000208 contacts →

Exact match

“Deeply rooted in community oncology centers globally, the START Center for Cancer Research ("START") provides patients with access to specialized Phase 1 clinical trials for novel…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2Exact matchMiami Lakes, FL, United StatesHQ recorded Sep 17, 202651-200106 contacts →

Exact match

“Segal Trials, founded in 1998, is a privately held network of seven research sites throughout South Florida conducting Phase I-IV research trials with a primary emphasis on…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3Exact matchBellevue, WA, United StatesHQ recorded Sep 17, 202611-5053 contacts →

Exact match

“NWCRC is a multi-specialty medical research center, dedicated to providing the highest quality medical evaluation services and interim care to our patients.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4Exact matchOrlando, United StatesHQ recorded Sep 17, 202611-5050 contacts →

Exact match

“Orlando Clinical Research Center (OCRC) is an independent Phase I-IV custom built sq.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5Exact matchOak Brook, IL, United StatesHQ recorded Sep 17, 202611-5041 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6Exact matchMiami, FL, United StatesHQ recorded Sep 17, 202611-5034 contacts →

Exact match

“Avantis Clinical Research is an independent fast- growing Phase I - IV clinical research center, specializing in internal medicine, oncology, psychiatry, women's health, and…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7Exact matchMontclair, CA, United StatesHQ recorded Sep 17, 202611-5029 contacts →

Exact match

“Catalina Research Institute (CRI) is a private multidisciplinary clinical trials facility specializing in the conduct of Phase II through Phase IV pharmaceutical drug studies.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8Exact matchMiami, FL, United StatesHQ recorded Sep 17, 202651-20029 contacts →

Exact match

“Miami Clinical Research is South Florida’s Premier Clinical Research Site.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9Exact matchOcala, FL, United StatesHQ recorded Sep 17, 202651-20026 contacts →

Exact match

“Renstar Medical Research is a standalone, community-based clinical research site headquartered in Ocala, North-Central Florida.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10Exact matchCanton, OH, United StatesHQ recorded Sep 17, 202611-5025 contacts →

Exact match

“Gabrail Cancer Center Research (GCCR) is a nationally recognized clinical research site dedicated to advancing oncology care through cutting-edge clinical trials.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11Exact matchWinter Park, FL, United StatesHQ recorded Sep 17, 202651-20019 contacts →

Exact match

“We are a multi-specialty network of highly experienced Phase I-IV clinical research sites dedicated to excellence and site optimization.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12Exact matchChicago, IL, United StatesHQ recorded Sep 17, 202611-5019 contacts →

Exact match

“The Uptown Research Institute is Chicagoland's premier private clinical trials site.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13Exact matchTucson, AZ, United StatesHQ recorded Sep 17, 202611-5018 contacts →

Exact match

“Del Sol Research Management, LLC is a locally owned dedicated medical research facility focused on conducting clinical trials on behalf of pharmaceutical companies.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14Exact matchNew Port Richey, FL, United StatesHQ recorded Sep 17, 202611-5016 contacts →

Exact match

“Suncoast Clinical Research partners with the world’s leading pharmaceutical companies and local physicians to conduct clinical trials.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15Exact matchCincinnati, OH, United StatesHQ recorded Sep 17, 20261-1015 contacts →

Exact match

“Community Research was acquired by CTI Clinical Trial and Consulting Services, and has been renamed CTI Clinical Research Center (CTI CRC).”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16Exact matchSpartanburg, SC, United StatesHQ recorded Sep 17, 202611-5013 contacts →

Exact match

“Spartanburg Medical Research is a dedicated Phase I-IV device/pharmaceutical research site.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17Exact matchBradenton, FL, United StatesHQ recorded Sep 17, 20261-1013 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18Exact matchQuincy, MA, United StatesHQ recorded Sep 17, 20261-1012 contacts →

Exact match

“Beacon Clinical Research is a multi-specialty clinical research facility specializing in Phase I-IV clinical trials.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19Exact matchMiami Lakes, FL, United StatesHQ recorded Sep 17, 202611-5011 contacts →

Exact match

“Wellness Clinical Research (WCR) is a multi-specialty state of the art research facility.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20Exact matchLima, OH, United StatesHQ recorded Sep 17, 202611-5011 contacts →

Exact match

“NexGen Research is a multispecialty clinical research site, built to provide the highest quality clinical research in the industry.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21Exact matchHialeah, FL, United StatesHQ recorded Sep 17, 202611-509 contacts →

Exact match

“AGA Clinical Trials is a highly awarded clinical trial research site located in Miami, Florida.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22Exact matchSnellville, GA, United StatesHQ recorded Sep 17, 202611-509 contacts →

Exact match

“Accelerated Clinical Trials, LLC.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23Exact matchChandler, AZ, United StatesHQ recorded Sep 17, 202611-508 contacts →

Exact match

“Chandler Clinical Trials has extensive experience conducting Phase I-IV clinical trials with many leading pharmaceutical companies.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24Exact matchLongwood, FL, United StatesHQ recorded Sep 17, 202611-507 contacts →

Exact match

“Future Medical Research is a sq ft dedicated clinical research site located in Longwood, Florida.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25Exact matchHouston, TX, United StatesHQ recorded Sep 17, 202611-507 contacts →

Exact match

“Specializing in clinical trials (phase 2,3, & 4), Synergy Groups Medical brings trusted clinical trial experience to the greater Houston area.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

Showing 25 of 66 phase one clinical trial sites based in the United States

See the full list, filter by size, metro and specialty, and access 290 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Phase one clinical trial sites based in the United States at a glance

As of Sep 17, 2026
26.5%Verified-email coverage
16.6Average contacts per company
11-50Median size (employees)
7.6%Largest-city concentration · Miami
Sep 17, 2026Page data refreshed

Companies by employee count

1-10
22
11-50
32
51-200
9
201-500
2
501-1,000
1

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 66 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “phase one clinical trial sites” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 290 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 17, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “phase one clinical trial sites”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many phase one clinical trial sites are there based in the United States?

RevenueBase identified 66 company matches for phase one clinical trial sites associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

The Start Center For Cancer Research tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most phase one clinical trial sites?

Miami leads with 5 company records, followed by Miami Lakes (3) and Pembroke Pines (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 290 professional contacts with verified work emails tracked across these 66 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 66 phase one clinical trial sites based in the United States. Start with a free account, no credit card.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.