Company lists · Data refreshed September 2026

Top 25 Laboratory testing services based in the United States

RevenueBase identified 2,130 company matches for laboratory testing services associated with the United States as of September 2026 and tracks 281,305 professional contacts across them, including 90,446 with verified work emails. Houston is the largest hub.

This list covers company matches for laboratory testing services 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 20, 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 20, 2026 How this list was built
2,130Companies
281,305Contacts tracked
90,446Verified emails
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The 25 largest laboratory testing services based in the United States

Ranked by team size
Top 25 of 2,130 company matches for laboratory testing services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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 matchWaltham, MA, United StatesHQ recorded Sep 20, 202610001+70,907 contacts →

Exact match

“About Thermo Fisher Scientific Thermo Fisher Scientific Inc.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2Exact matchSanta Clara, CA, United StatesHQ recorded Sep 20, 202610001+48,455 contacts →

Exact match

“Agilent customers are finding new ways to treat cancer, ensure food, water, air, and medicine quality and safety, discover new drug treatments, research infectious diseases, and…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3Exact matchBurlington, NC, United StatesHQ recorded Sep 20, 202610001+38,427 contacts →

Exact match

“Clear and confident health care decisions begin with questions.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchSecaucus, NJ, United StatesHQ recorded Sep 20, 202610001+27,884 contacts →

Exact match

“Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact matchBrea, CA, United StatesHQ recorded Sep 20, 202610001+10,069 contacts →

Exact match

“A global leader in advanced diagnostics, Beckman Coulter has challenged convention to elevate the diagnostic laboratory’s role in improving patient health for more than 80 years.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchMilford, MA, United StatesHQ recorded Sep 20, 202610001+8,189 contacts →

Exact match

“Waters Corporation (NYSE: WAT) is a global leader in life sciences and diagnostics, dedicated to accelerating the benefits of pioneering science through analytical technologies…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchWestbrook, ME, United StatesHQ recorded Sep 20, 202610001+6,962 contacts →

Exact match

“people, one global focus - enhancing the health and well-being of pets, people, and livestock We are passionate about what we do at IDEXX – and why wouldn’t we be?”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchSalt Lake City, UT, United StatesHQ recorded Sep 20, 20261,001-5,0002,768 contacts →

Exact match

“ARUP Laboratories is a national clinical and anatomic pathology reference laboratory and a worldwide leader in innovative laboratory research and development.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchMinneapolis, MN, United StatesHQ recorded Sep 20, 20261,001-5,0002,228 contacts →

Exact match

“Pace® Science and Technology Company makes the world a safer, healthier place.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchUk, AZ, United StatesHQ recorded Sep 20, 20261,001-5,0001,878 contacts →

Exact match

“Clinisys acquired Orchard Software July 2025 (see press release https://tinyurl.com/clinisysnews)* Clinisys delivers over 45 years of laboratory informatics expertise – built…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchLancaster, PA, United StatesHQ recorded Sep 20, 20261,001-5,0001,638 contacts →

Exact match

“Eurofins Lancaster Laboratories is one of the largest commercial contract laboratories in the world providing comprehensive laboratory services in the pharmaceutical…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchElmwood Park, NJ, United StatesHQ recorded Sep 20, 20261,001-5,0001,610 contacts →

Exact match

“For more than four decades, BioReference has built a legacy based on scientific excellence, innovation and world-class service in laboratory testing solutions.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact matchAustin, TX, United StatesHQ recorded Sep 20, 20261,001-5,0001,528 contacts →

Exact match

“Clinical Pathology Laboratories (CPL) is a medically-led company dating back to 1948.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchLenexa, KS, United StatesHQ recorded Sep 20, 20261,001-5,0001,369 contacts →

Exact match

“ExamOne has provided a robust portfolio of laboratory, paramedical and data solutions since 1972, giving it a great deal of understanding about the needs of life insurance and…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchDurham, NC, United StatesHQ recorded Sep 20, 20261,001-5,0001,291 contacts →

Exact match

“Q² Solutions is now IQVIA Laboratories.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchPhoenix, AZ, United StatesHQ recorded Sep 20, 20261,001-5,0001,222 contacts →

Exact match

“Sonora Quest Laboratories, a subsidiary of Laboratory Sciences of Arizona, is an Arizona-based joint venture between Banner Health and Quest Diagnostics (NYSE: DGX) that makes up…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchBrentwood, TN, United StatesHQ recorded Sep 20, 20261,001-5,0001,098 contacts →

Exact match

“Founded in 1965, PathGroup is a premier provider of anatomic, clinical and molecular pathology services, as well as one of the largest providers of women’s health services in the…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchSalt Lake City, UT, United StatesHQ recorded Sep 20, 2026501-1,000775 contacts →

Exact match

“Nelson Labs is a global leader in microbiological and analytical chemistry testing and advisory services for the medical device and pharmaceutical industries.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchCinnaminson, NJ, United StatesHQ recorded Sep 20, 2026501-1,000719 contacts →

Exact match

“As the nation's leading environmental testing firm, EMSL's network of nationwide laboratories has been providing quality analytical services since 1981.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchNashville, TN, United StatesHQ recorded Sep 20, 2026501-1,000690 contacts →

Exact match

“Founded in 1990, Aegis Sciences Corporation is a forensic toxicology and healthcare laboratory that provides science-driven drug testing and consulting services based in…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchAlbuquerque, NM, United StatesHQ recorded Sep 20, 20261,001-5,000675 contacts →

Exact match

“TriCore is a community-based, independent, clinical reference laboratory that provides full-service, state-of-the-art laboratory tests to health care professionals and their…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchSan Diego, CA, United StatesHQ recorded Sep 20, 2026501-1,000665 contacts →

Exact match

“Millennium Health is an accredited specialty laboratory with over 15 years of experience delivering timely, accurate, clinically-actionable information through our nationwide…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchLake Forest Park, WA, United StatesHQ recorded Sep 20, 20261,001-5,000651 contacts →

Exact match

“IEH is an international lab & consulting services company, offering a comprehensive portfolio of lab testing services and consultation across multiple industries.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchGreensboro, NC, United StatesHQ recorded Sep 20, 20261,001-5,000649 contacts →

Exact match

“Solstas Lab Partners has become one of the nation’s fastest-growing and largest full-service laboratories because we understand that our business is more than just test results.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchHammond, IN, United StatesHQ recorded Sep 20, 20261,001-5,000619 contacts →

Exact match

“Alverno Laboratories manages 32 hospital laboratories and provides laboratory services to two free standing emergency departments and thousands of physician offices and other…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 2,130 laboratory testing services based in the United States

See the full list, filter by size, metro and specialty, and access 90,446 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Laboratory testing services based in the United States at a glance

As of Sep 20, 2026
32.2%Verified-email coverage
132.1Average contacts per company
11-50Median size (employees)
2.3%Largest-city concentration · Houston
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
715
11-50
811
51-200
399
201-500
102
501-1,000
39
1,001-5,000
40
5,001-10,000
5
10001+
15

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 2,130 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 “laboratory testing services” 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 90,446 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 20, 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 “laboratory testing services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many laboratory testing services are there based in the United States?

RevenueBase identified 2,130 company matches for laboratory testing services 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?

Thermo Fisher Scientific tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most laboratory testing services?

Houston leads with 49 company records, followed by San Diego (28) and New York (26).

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 90,446 professional contacts with verified work emails tracked across these 2,130 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 20, 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 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.