Company lists · Data refreshed September 2026

Top 25 Clinical diagnostic laboratories based in the United States

Name: Clinical diagnostic laboratories based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 1,362 companies tracked

RevenueBase identified 1,362 clinical diagnostic laboratories headquartered in the United States as of September 2026 and tracks 136,709 professional contacts across them, including 41,129 with verified work emails. Houston is the largest hub.

This list covers clinical diagnostic laboratories 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 16, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

1,362Companies

136,709Contacts tracked

41,129Verified emails

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The 25 largest clinical diagnostic laboratories based in the United States

Ranked by team size

Top 25 of 1,362 clinical diagnostic laboratories based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to clinical diagnostic laboratories: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Labcorp	Indirect evidence	Burlington, NC, United StatesHQ checked Sep 16, 2026	10001+	38,427 contacts →
	Indirect evidence “Clear and confident health care decisions begin with questions.” Source: RevenueBase Database · checked Sep 16, 2026
2	Quest Diagnostics	Partial evidence	Secaucus, NJ, United StatesHQ checked Sep 16, 2026	10001+	27,884 contacts →
	Partial evidence “Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes.” Source: RevenueBase Database · checked Sep 16, 2026
3	Beckman Coulter Diagnostics	Partial evidence	Brea, CA, United StatesHQ checked Sep 16, 2026	10001+	10,069 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
4	Natera	Indirect evidence	Austin, TX, United StatesHQ checked Sep 16, 2026	5,001-10,000	5,354 contacts →
	Indirect evidence “Natera™ is a global leader in cell-free DNA and precision medicine, dedicated to oncology, women’s health, and organ health.” Source: RevenueBase Database · checked Sep 16, 2026
5	Arup Laboratories	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,768 contacts →
	Strong evidence “ARUP Laboratories is a national clinical and anatomic pathology reference laboratory and a worldwide leader in innovative laboratory research and development.” Source: RevenueBase Database · checked Sep 16, 2026
6	Myriad Genetics	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,718 contacts →
	Partial evidence “Myriad Genetics is a leading molecular diagnostic testing and precision medicine company dedicated to advancing health and well-being for all.” Source: RevenueBase Database · checked Sep 16, 2026
7	Bioreference	Indirect evidence	Elmwood Park, NJ, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,610 contacts →
	Indirect evidence “For more than four decades, BioReference has built a legacy based on scientific excellence, innovation and world-class service in laboratory testing solutions.” Source: RevenueBase Database · checked Sep 16, 2026
8	Clinical Pathology Laboratories	Strong evidence	Austin, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,528 contacts →
	Strong evidence “Clinical Pathology Laboratories (CPL) is a medically-led company dating back to 1948.” Source: RevenueBase Database · checked Sep 16, 2026
9	Examone, A Quest Diagnostics Company	Indirect evidence	Lenexa, KS, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,369 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
10	Q Solutions	Partial evidence	Durham, NC, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,291 contacts →
	Partial evidence “Q² Solutions is now IQVIA Laboratories.” Source: RevenueBase Database · checked Sep 16, 2026
11	Sonora Quest Laboratories Laboratory Sciences Of Arizona	Strong evidence	Phoenix, AZ, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,222 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
12	Pathgroup	Partial evidence	Brentwood, TN, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,098 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
13	Genedx	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,048 contacts →
	Indirect evidence “We see a world where every genetic condition is understood, and every patient receives the care they need to live their healthiest life through genomics.” Source: RevenueBase Database · checked Sep 16, 2026
14	Ambry Genetics	Partial evidence	Aliso Viejo, CA, United StatesHQ checked Sep 16, 2026	501-1,000	957 contacts →
	Partial evidence “Ambry Genetics, a Tempus company, translates scientific research into clinically actionable test results based upon a deep understanding of the human genome and the biology behind…” Source: RevenueBase Database · checked Sep 16, 2026
15	Aegis Sciences Corporation	Indirect evidence	Nashville, TN, United StatesHQ checked Sep 16, 2026	501-1,000	690 contacts →
	Indirect evidence “Founded in 1990, Aegis Sciences Corporation is a forensic toxicology and healthcare laboratory that provides science-driven drug testing and consulting services based in…” Source: RevenueBase Database · checked Sep 16, 2026
16	Veracyte, INC	Strong evidence	South San Francisco, CA, United StatesHQ checked Sep 16, 2026	501-1,000	675 contacts →
	Strong evidence “Veracyte is a global diagnostics company that empowers clinicians with the high-value insights they need to guide and assure patients at pivotal moments in the race to diagnose…” Source: RevenueBase Database · checked Sep 16, 2026
17	Tricore Reference Laboratories	Partial evidence	Albuquerque, NM, United StatesHQ checked Sep 16, 2026	1,001-5,000	675 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
18	Solstas LAB Partners	Partial evidence	Greensboro, NC, United StatesHQ checked Sep 16, 2026	1,001-5,000	649 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
19	Alverno Laboratories	Partial evidence	Hammond, IN, United StatesHQ checked Sep 16, 2026	1,001-5,000	619 contacts →
	Partial evidence “Alverno Laboratories manages 32 hospital laboratories and provides laboratory services to two free standing emergency departments and thousands of physician offices and other…” Source: RevenueBase Database · checked Sep 16, 2026
20	Sonic Healthcare USA	Partial evidence	Dallas, TX, United StatesHQ checked Sep 16, 2026	5,001-10,000	614 contacts →
	Partial evidence “Sonic Healthcare USA is a subsidiary of Sonic Healthcare Limited, one of the world's largest medical diagnostics companies, providing laboratory services to medical practitioners…” Source: RevenueBase Database · checked Sep 16, 2026
21	HNL LAB Medicine	Indirect evidence	Allentown, PA, United StatesHQ checked Sep 16, 2026	1,001-5,000	563 contacts →
	Indirect evidence “Our Vision is To create a future where every person has the clarity and insight to live healthier.” Source: RevenueBase Database · checked Sep 16, 2026
22	American Health Associates	Partial evidence	Davie, FL, United StatesHQ checked Sep 16, 2026	1,001-5,000	459 contacts →
	Partial evidence “American Health Associates is the largest provider of clinical laboratory services to long term care in the United States.” Source: RevenueBase Database · checked Sep 16, 2026
23	Clinical Reference Laboratory	Partial evidence	Lenexa, KS, United StatesHQ checked Sep 16, 2026	501-1,000	457 contacts →
	Partial evidence “CRL was originally founded as Enzyme Technologies in 1979 with our focus on clinical research and development.” Source: RevenueBase Database · checked Sep 16, 2026
24	ACM Global Laboratories	Strong evidence	Rochester, NY, United StatesHQ checked Sep 16, 2026	1,001-5,000	446 contacts →
	Strong evidence “ACM Global Laboratories, an affiliate of Rochester Regional Health in Rochester, New York, is a recognized leader global clinical trial testing services.” Source: RevenueBase Database · checked Sep 16, 2026
25	Medical Diagnostic Laboratories MDL	Strong evidence	Hamilton, NJ, United StatesHQ checked Sep 16, 2026	501-1,000	436 contacts →
	Strong evidence “Medical Diagnostic Laboratories (MDL), founded in 1997, serves primarily as a reference laboratory for Polymerase Chain Reaction (PCR) based testing to physicians, laboratories…” Source: RevenueBase Database · checked Sep 16, 2026

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: clinical diagnostic laboratories. 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 clinical diagnostic laboratories.
Partial evidence: Its own public description names part of clinical diagnostic laboratories, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clinical diagnostic laboratories. 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 1,362 clinical diagnostic laboratories based in the United States

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Clinical diagnostic laboratories based in the United States at a glance

As of Sep 16, 2026

30.1%Verified-email coverage

100.4Average contacts per company

11-50Median size (employees)

2.9%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

406

11-50

492

51-200

301

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,362 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 clinical diagnostic laboratories, 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 “clinical diagnostic laboratories”. 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 clinical diagnostic laboratories), 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 clinical diagnostic laboratories, 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, 41,129 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 16, 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.

Clinical diagnostic laboratories by metro

Clinical diagnostic laboratories in Houston40

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 clinical diagnostic laboratories, 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 clinical diagnostic laboratories are there based in the United States?

RevenueBase identified 1,362 clinical diagnostic laboratories 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?

Labcorp, headquartered in Burlington, tops this list with the largest team on record.

Which city has the most clinical diagnostic laboratories?

Houston leads with 40 headquartered companies, followed by Irvine (24) and New York (24).

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 41,129 verified decision-maker contacts tracked across these 1,362 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 16, 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.