Company lists · Data refreshed September 2026
Top 25 Rare disease patient recruitment companies based in the United States
RevenueBase identified 442 rare disease patient recruitment companies headquartered in the United States as of September 2026 and tracks 35,876 professional contacts across them, including 16,770 with verified work emails. New York is the largest hub.
This list covers rare disease patient recruitment companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.
The 25 largest rare disease patient recruitment companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 20,530 contacts → | ||||
Indirect evidence “The PPD™ clinical research business of Thermo Fisher Scientific, the world leader in serving science, enables customers to accelerate innovation and drug development through…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,781 contacts → | ||||
Indirect evidence “Precision for Medicine is an industry-leading global clinical research services organization, purpose-built to improve the clinical research and development process for new…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,043 contacts → | ||||
Indirect evidence “CTI Clinical Trial and Consulting Services is a global, privately held, research service organization, delivering a complete spectrum of clinical trial and consulting services…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 971 contacts → | ||||
Indirect evidence “Velocity is the world’s leading organization of fully integrated clinical research sites.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 847 contacts → | ||||
Indirect evidence “CenExel is a leading integrated, wholly owned, nationwide clinical research site network comprised of 18 Centers of Excellence in major metropolitan areas across the U.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 770 contacts → | ||||
Strong evidence “MMG is a full-service global health communications group that specializes in patient recruitment and retention.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 590 contacts → | ||||
Indirect evidence “DM Clinical Research is a network of clinical trial investigator sites with headquarters based out of Houston, Texas.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 561 contacts → | ||||
Indirect evidence “Accelerated Enrollment Solutions (AES) is now Trialmed.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 367 contacts → | ||||
Indirect evidence “Veristat is the science-first full-service drug and biologic CRO and consultancy that integrates strategic planning, regulatory expertise, and clinical trial execution to rapidly…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 291 contacts → | ||||
Partial evidence “Science 37 is a modern clinical research site that delivers trials directly to patients’ homes.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 254 contacts → | ||||
Partial evidence “Elligo Health Research is an integrated research organization founded to bridge the gap between cutting-edge clinical trials and the patients who need them-an idea that sparked…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 201 contacts → | ||||
Indirect evidence “EmVenio Clinical Research, a Professional Case Management subsidiary, operates from U.S.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 194 contacts → | ||||
Strong evidence “As the premier Patient Experience Platform, SubjectWell drives predictable clinical trial patient recruitment, improves patient engagement, and enhances retention by optimizing…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 189 contacts → | ||||
Strong evidence “Founded in 2003, CG Life is a specialized pharma agency built for the unique challenges of bringing therapies for rare and hard-to-treat diseases to market, where traditional…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 171 contacts → | ||||
Partial evidence “Clinical Trial Media (CTM) is the largest full-service global patient enrollment organization, with three decades of experience supporting pharmaceutical and biotechnology…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 168 contacts → | ||||
Indirect evidence “Dr.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 168 contacts → | ||||
Strong evidence “Bionews is a digital health solutions company dedicated to empowering more than 50 rare disease communities with trusted information, news, and connections.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 161 contacts → | ||||
Indirect evidence “ERG is a leading U.S.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 161 contacts → | ||||
Indirect evidence “M3 Wake Research is a premier clinical trial network that has been conducting studies since 1984.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 156 contacts → | ||||
Strong evidence “The National Organization for Rare Disorders (NORD), a 501(c)(3) organization, is an independent patient advocacy organization dedicated to helping individuals with rare diseases…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 152 contacts → | ||||
Partial evidence “Iterative Health is a healthcare technology and services company powering the acceleration of clinical research to transform patient outcomes.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 145 contacts → | ||||
Strong evidence “Claritas Rx helps rare disease and specialty brands remove the barriers that keep patients from accessing and staying on the treatments they need.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 140 contacts → | ||||
Strong evidence “WCG ThreeWire is a global, full-service patient recruitment provider that partners with pharmaceutical, biotech companies, and clinical research organizations to improve the…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 134 contacts → | ||||
Indirect evidence “At Pinnacle Clinical Research, we are driven by a shared mission to improve lives through innovation in clinical trials.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 123 contacts → | ||||
Indirect evidence “Our clinical research network is a collaborative group of providers and sites dedicated to clinical research across multiple therapeutic areas.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: rare disease patient recruitment companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names rare disease patient recruitment companies.
- Partial evidence
- Its own public description names part of rare disease patient recruitment companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name rare disease patient recruitment companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 442 rare disease patient recruitment companies based in the United States
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Rare disease patient recruitment companies based in the United States at a glance
As of Sep 29, 2026Companies by employee count
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 442 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among rare disease patient recruitment companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “rare disease patient recruitment companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names rare disease patient recruitment companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among rare disease patient recruitment companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 16,770 across the full list. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names rare disease patient recruitment companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many rare disease patient recruitment companies are there based in the United States?
RevenueBase identified 442 rare disease patient recruitment companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
PPD, headquartered in Waltham, tops this list with the largest team on record.
Which city has the most rare disease patient recruitment companies?
New York leads with 15 headquartered companies, followed by Boston (13) and Miami (13).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 16,770 verified decision-maker contacts tracked across these 442 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.
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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 Smart Search, 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.
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