Company lists · Data refreshed September 2026

Top 25 Medical testing laboratories based in the United States

Name: Medical testing 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 17, 2026 1,816 companies tracked

RevenueBase identified 1,816 medical testing laboratories headquartered in the United States as of September 2026 and tracks 201,868 professional contacts across them, including 52,993 with verified work emails. Houston is the largest hub.

This list covers medical testing 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 17, 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 17, 2026 86% judged on-target in blind review

1,816Companies

201,868Contacts tracked

52,993Verified emails

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The 25 largest medical testing laboratories based in the United States

Ranked by team size

Top 25 of 1,816 medical testing laboratories based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to medical testing 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	Agilent Technologies	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 17, 2026	10001+	48,455 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
2	Labcorp	Indirect evidence	Burlington, NC, United StatesHQ checked Sep 17, 2026	10001+	38,427 contacts →
	Indirect evidence “Clear and confident health care decisions begin with questions.” Source: RevenueBase Database · checked Sep 17, 2026
3	Quest Diagnostics	Indirect evidence	Secaucus, NJ, United StatesHQ checked Sep 17, 2026	10001+	27,884 contacts →
	Indirect evidence “Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes.” Source: RevenueBase Database · checked Sep 17, 2026
4	Beckman Coulter Diagnostics	Indirect evidence	Brea, CA, United StatesHQ checked Sep 17, 2026	10001+	10,069 contacts →
	Indirect 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 17, 2026
5	Waters Corporation	Indirect evidence	Milford, MA, United StatesHQ checked Sep 17, 2026	10001+	8,189 contacts →
	Indirect evidence “Waters Corporation (NYSE: WAT) is a global leader in life sciences and diagnostics, dedicated to accelerating the benefits of pioneering science through analytical technologies…” Source: RevenueBase Database · checked Sep 17, 2026
6	Cepheid	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,445 contacts →
	Indirect evidence “Cepheid is dedicated to improving healthcare by pioneering molecular diagnostics that combine speed, accuracy, and flexibility.” Source: RevenueBase Database · checked Sep 17, 2026
7	Arup Laboratories	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,768 contacts →
	Partial 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 17, 2026
8	Myriad Genetics	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,718 contacts →
	Strong 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 17, 2026
9	Bioreference	Partial evidence	Elmwood Park, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,610 contacts →
	Partial 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 17, 2026
10	Clinical Pathology Laboratories	Strong evidence	Austin, TX, United StatesHQ checked Sep 17, 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 17, 2026
11	Examone, A Quest Diagnostics Company	Indirect evidence	Lenexa, KS, United StatesHQ checked Sep 17, 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 17, 2026
12	Sysmex America, INC	Indirect evidence	Lincolnshire, IL, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,313 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
13	Sonora Quest Laboratories Laboratory Sciences Of Arizona	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,222 contacts →
	Partial 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 17, 2026
14	Pathgroup	Indirect evidence	Brentwood, TN, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,098 contacts →
	Indirect 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 17, 2026
15	Tridentcare	Indirect evidence	Sparks, MD, United StatesHQ checked Sep 17, 2026	1,001-5,000	868 contacts →
	Indirect evidence “TridentCare is the leading portable diagnostic services solution for a variety of healthcare markets, delivering quality services at our customers’ locations nationwide.” Source: RevenueBase Database · checked Sep 17, 2026
16	Nelson Labs	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 17, 2026	501-1,000	775 contacts →
	Strong evidence “Nelson Labs is a global leader in microbiological and analytical chemistry testing and advisory services for the medical device and pharmaceutical industries.” Source: RevenueBase Database · checked Sep 17, 2026
17	Emsl Analytical, INC	Strong evidence	Cinnaminson, NJ, United StatesHQ checked Sep 17, 2026	501-1,000	719 contacts →
	Strong evidence “As the nation's leading environmental testing firm, EMSL's network of nationwide laboratories has been providing quality analytical services since 1981.” Source: RevenueBase Database · checked Sep 17, 2026
18	Aegis Sciences Corporation	Partial evidence	Nashville, TN, United StatesHQ checked Sep 17, 2026	501-1,000	690 contacts →
	Partial 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 17, 2026
19	Meridian Bioscience INC	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 17, 2026	501-1,000	688 contacts →
	Indirect evidence “Meridian is a fully integrated life science company that develops, manufactures, markets and distributes a broad range of innovative diagnostic test kits, rare reagents, specialty…” Source: RevenueBase Database · checked Sep 17, 2026
20	Tricore Reference Laboratories	Indirect evidence	Albuquerque, NM, United StatesHQ checked Sep 17, 2026	1,001-5,000	675 contacts →
	Indirect 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 17, 2026
21	Solstas LAB Partners	Partial evidence	Greensboro, NC, United StatesHQ checked Sep 17, 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 17, 2026
22	Alverno Laboratories	Partial evidence	Hammond, IN, United StatesHQ checked Sep 17, 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 17, 2026
23	Sonic Healthcare USA	Partial evidence	Dallas, TX, United StatesHQ checked Sep 17, 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 17, 2026
24	HNL LAB Medicine	Indirect evidence	Allentown, PA, United StatesHQ checked Sep 17, 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 17, 2026
25	Microbac Laboratories, INC	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 17, 2026	501-1,000	494 contacts →
	Indirect evidence “Companies of all sizes partner with Microbac to test the quality, safety, and performance of their products and operations.” Source: RevenueBase Database · checked Sep 17, 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: medical testing 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 medical testing laboratories.
Partial evidence: Its own public description names part of medical testing laboratories, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name medical testing 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 1,816 medical testing laboratories based in the United States

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Medical testing laboratories based in the United States at a glance

As of Sep 17, 2026

26.3%Verified-email coverage

111.2Average contacts per company

11-50Median size (employees)

2.4%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

569

11-50

687

51-200

365

201-500

100

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 1,816 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 medical testing 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 “medical testing 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 medical testing 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 medical testing 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, 52,993 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 17, 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.

Medical testing laboratories by metro

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 medical testing 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 medical testing laboratories are there based in the United States?

RevenueBase identified 1,816 medical testing 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?

Agilent Technologies, headquartered in Santa Clara, tops this list with the largest team on record.

Which city has the most medical testing laboratories?

Houston leads with 44 headquartered companies, followed by New York (28) and Irvine (27).

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 52,993 verified decision-maker contacts tracked across these 1,816 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 17, 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.