Company lists · Data refreshed September 2026

Top 25 Medical diagnostics companies based in the United States

RevenueBase identified 1,544 medical diagnostics companies headquartered in the United States as of September 2026 and tracks 236,911 professional contacts across them, including 71,683 with verified work emails. San Diego is the largest hub.

This list covers medical diagnostics 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 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
1,544Companies
236,911Contacts tracked
71,683Verified emails
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The 25 largest medical diagnostics companies based in the United States

Ranked by team size
Top 25 of 1,544 medical diagnostics companies 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 diagnostics companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceSanta Clara, CA, United StatesHQ checked Sep 17, 202610001+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
2Indirect evidenceBurlington, NC, United StatesHQ checked Sep 17, 202610001+38,427 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 17, 2026
3Partial evidenceSecaucus, NJ, United StatesHQ checked Sep 17, 202610001+27,884 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 17, 2026
4Partial evidenceBrea, CA, United StatesHQ checked Sep 17, 202610001+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 17, 2026
5Partial evidenceMilford, MA, United StatesHQ checked Sep 17, 202610001+8,189 contacts →

Partial 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
6Strong evidenceHercules, CA, United StatesHQ checked Sep 17, 20265,001-10,0008,149 contacts →

Strong evidence

“Bio-Rad provides the healthcare industry with innovative and useful products that help life science researchers accelerate the discovery process and medical diagnostic labs obtain…”

Source: RevenueBase Database · checked Sep 17, 2026
7Indirect evidenceMadison, WI, United StatesHQ checked Sep 17, 20265,001-10,0005,907 contacts →

Indirect evidence

“Exact Sciences is now @Abbott.”

Source: RevenueBase Database · checked Sep 17, 2026
8Partial evidenceAustin, TX, United StatesHQ checked Sep 17, 20265,001-10,0005,354 contacts →

Partial 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 17, 2026
9Partial evidenceSunnyvale, CA, United StatesHQ checked Sep 17, 20265,001-10,0004,445 contacts →

Partial evidence

“Cepheid is dedicated to improving healthcare by pioneering molecular diagnostics that combine speed, accuracy, and flexibility.”

Source: RevenueBase Database · checked Sep 17, 2026
10Indirect evidenceWaltham, MA, United StatesHQ checked Sep 17, 202610001+3,436 contacts →

Indirect evidence

“Life Technologies is now part of Thermo Fisher Scientific.”

Source: RevenueBase Database · checked Sep 17, 2026
11Indirect evidenceLos Angeles, CA, United StatesHQ checked Sep 17, 202610001+3,126 contacts →

Indirect evidence

“RadNet, Inc.”

Source: RevenueBase Database · checked Sep 17, 2026
12Indirect evidenceWaltham, MA, United StatesHQ checked Sep 17, 202610001+2,938 contacts →

Indirect evidence

“At Revvity, “impossible” is inspiration, and ""can't be done"" is a call to action.”

Source: RevenueBase Database · checked Sep 17, 2026
13Indirect evidenceSalt Lake City, UT, United StatesHQ checked Sep 17, 20261,001-5,0002,768 contacts →

Indirect 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
14Indirect evidenceRaritan, NJ, United StatesHQ checked Sep 17, 20261,001-5,0002,730 contacts →

Indirect evidence

“QuidelOrtho develops and manufactures intelligent solutions that are transforming data into understanding and action for more people in more places every day, helping spot trends…”

Source: RevenueBase Database · checked Sep 17, 2026
15Strong evidenceSalt Lake City, UT, United StatesHQ checked Sep 17, 20261,001-5,0002,718 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
16Indirect evidenceBedford, MA, United StatesHQ checked Sep 17, 20261,001-5,0001,908 contacts →

Indirect evidence

“Werfen is a growing, family-owned, innovative company founded in 1966 in Barcelona, Spain.”

Source: RevenueBase Database · checked Sep 17, 2026
17Partial evidenceFountain Valley, CA, United StatesHQ checked Sep 17, 20261,001-5,0001,884 contacts →

Partial evidence

“Smarter Diagnostics.”

Source: RevenueBase Database · checked Sep 17, 2026
18Indirect evidenceLexington, MA, United StatesHQ checked Sep 17, 2026501-1,0001,622 contacts →

Indirect evidence

“FUJIFILM Healthcare Americas Corporation is a comprehensive healthcare company that has an extensive range of technology and expertise in the detection, diagnosis, and treatment…”

Source: RevenueBase Database · checked Sep 17, 2026
19Indirect evidenceElmwood Park, NJ, United StatesHQ checked Sep 17, 20261,001-5,0001,610 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 17, 2026
20Partial evidenceAustin, TX, United StatesHQ checked Sep 17, 20261,001-5,0001,528 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 17, 2026
21Indirect evidenceLincolnshire, IL, United StatesHQ checked Sep 17, 20261,001-5,0001,313 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 17, 2026
22Partial evidencePhoenix, AZ, United StatesHQ checked Sep 17, 20261,001-5,0001,222 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
23Indirect evidenceWaltham, MA, United StatesHQ checked Sep 17, 20261,001-5,0001,107 contacts →

Indirect evidence

“Nova Biomedical is entering a new chapter.”

Source: RevenueBase Database · checked Sep 17, 2026
24Indirect evidenceBrentwood, TN, United StatesHQ checked Sep 17, 20261,001-5,0001,098 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
25Partial evidenceSparks, MD, United StatesHQ checked Sep 17, 20261,001-5,000868 contacts →

Partial 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

Showing 25 of 1,544 medical diagnostics companies based in the United States

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Medical diagnostics companies based in the United States at a glance

As of Sep 17, 2026
30.3%Verified-email coverage
153.4Average contacts per company
11-50Median size (employees)
2.7%Largest-city concentration · San Diego
Sep 17, 2026Page data refreshed

Companies by employee count

1-10
502
11-50
535
51-200
325
201-500
81
501-1,000
33
1,001-5,000
47
5,001-10,000
5
10001+
16

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 1,544 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 diagnostics 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 “medical diagnostics 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 medical diagnostics 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 medical diagnostics 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, 71,683 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.

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 diagnostics 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 medical diagnostics companies are there based in the United States?

RevenueBase identified 1,544 medical diagnostics 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?

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

Which city has the most medical diagnostics companies?

San Diego leads with 42 headquartered companies, followed by Houston (32) and New York (31).

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 71,683 verified decision-maker contacts tracked across these 1,544 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.