Company lists · Data refreshed November 2026

Top 25 Occupational health testing laboratories worldwide

RevenueBase identified 6,461 company matches for occupational health testing laboratories worldwide as of November 2026 and tracks 181,641 professional contacts across them, including 31,596 with verified work emails. Brazil is the largest market and Sao Paulo the largest hub.

This list covers company matches for occupational health testing laboratories worldwide, 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 November 6, 2026. Country and city lists for occupational health testing laboratories follow the table.

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 Nov 6, 2026 How this list was built
6,461Companies
181,641Contacts tracked
31,596Verified emails
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The 25 largest occupational health testing laboratories worldwide

Ranked by team size
Top 25 of 6,461 company matches for occupational health testing laboratories worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchSecaucus, NJ, United StatesHQ recorded Nov 6, 202610001+30,147 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLuxembourgHQ recorded Nov 6, 202610001+12,649 contacts →

Exact match

“Since 1987, Eurofins has grown from one laboratory in Nantes, France to over staff across a network of independent companies in 59 countries, operating over 950 laboratories.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchBowen Hills, TX, AustraliaHQ recorded Nov 6, 202610001+10,555 contacts →

Exact match

“A global leader in testing, ALS provides comprehensive testing solutions to clients in a wide range of industries around the world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchJohannesburg, South AfricaHQ recorded Nov 6, 20265,001-10,0004,563 contacts →

Exact match

“Lancet Laboratories SA is one of the leading pathology laboratories operating throughout South Africa, providing vital diagnostic and monitoring pathology services in the 9…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchBehind Glaxo, IndiaHQ recorded Nov 6, 20261,001-5,0002,978 contacts →

Exact match

“We believe that every human being deserves to know the truth about their inner health.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchMinneapolis, NC, United StatesHQ recorded Nov 6, 20261,001-5,0002,334 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchCape Town, South AfricaHQ recorded Nov 6, 20261,001-5,0002,250 contacts →

Exact match

“PathCare Laboratories PathCare is a network of pathology laboratories that provide testing of specimens, primarily for medical diagnostic purposes.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchElmwood Park, NJ, United StatesHQ recorded Nov 6, 20261,001-5,0001,520 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 · Nov 6, 2026 · View company records in RevenueBase
9Exact matchLenexa, KS, United StatesHQ recorded Nov 6, 20261,001-5,0001,415 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 · Nov 6, 2026 · View company records in RevenueBase
10Exact matchPhoenix, AZ, United StatesHQ recorded Nov 6, 20261,001-5,0001,295 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 · Nov 6, 2026 · View company records in RevenueBase
11Exact matchCalgary, QC, CanadaHQ recorded Nov 6, 20261,001-5,0001,126 contacts →

Exact match

“Since 1979, AGAT Laboratories has been empowering clients with trustworthy data and unmatched client relations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchBowen Hills, AustraliaHQ recorded Nov 6, 20261,001-5,0001,062 contacts →

Exact match

“Sullivan Nicolaides Pathology is one of Australia’s largest and most respected diagnostic testing laboratories, regarded for our expertise in esoteric as much as routine testing.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchHouston, TX, United StatesHQ recorded Nov 6, 20261,001-5,000910 contacts →

Exact match

“DISA has been providing full-service employee screening solutions since 1987.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchBogota, ColombiaHQ recorded Nov 6, 2026501-1,000901 contacts →

Exact match

“Aliado estratégico para empresas e instituciones de salud en Colombia |+80 sedes en el país | Red de laboratorios clínicos #1 en Europa | Estándares internacionales de calidad…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchCinnaminson, NJ, United StatesHQ recorded Nov 6, 2026501-1,000766 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 · Nov 6, 2026 · View company records in RevenueBase
16Exact matchNashville, TN, United StatesHQ recorded Nov 6, 2026501-1,000738 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 · Nov 6, 2026 · View company records in RevenueBase
17Exact matchHeidelberg, AustraliaHQ recorded Nov 6, 20261,001-5,000709 contacts →

Exact match

“Dorevitch Pathology was founded by Dr Abe Dorevitch in August 1970.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchAmericana, BrazilHQ recorded Nov 6, 2026201-500671 contacts →

Exact match

“Fundada em 1994 na cidade de Americana-SP, no centro Região Metropolitana de Campinas,o Grupo MEDNET Medicina e Segurança do Trabalho dedica-se à prestação de serviços…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchSan Diego, CA, United StatesHQ recorded Nov 6, 2026501-1,000626 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchGiza, EgyptHQ recorded Nov 6, 20261,001-5,000624 contacts →

Exact match

“al mokhtabar is the largest private medical laboratory testing company in the Middle East, providing diagnostic laboratory services, pathological and clinical tests for medical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchNorth Ryde, AustraliaHQ recorded Nov 6, 20261,001-5,000593 contacts →

Exact match

“4Cyte Pathology is an independent specialist medical laboratory and pathology provider based in ACT, NSW, QLD and VIC, Australia.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchLenexa, KS, United StatesHQ recorded Nov 6, 2026501-1,000503 contacts →

Exact match

“CRL was originally founded as Enzyme Technologies in 1979 with our focus on clinical research and development.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchPittsburgh, OH, United StatesHQ recorded Nov 6, 2026501-1,000500 contacts →

Exact match

“Companies of all sizes partner with Microbac to test the quality, safety, and performance of their products and operations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchRochester, United StatesHQ recorded Nov 6, 20261,001-5,000462 contacts →

Exact match

“ACM Global Laboratories, an affiliate of Rochester Regional Health in Rochester, New York, is a recognized leader global clinical trial testing services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchTlalpan, MexicoHQ recorded Nov 6, 2026501-1,000458 contacts →

Exact match

“Laboratorios Medico Chopo Sa De Cv is a company based out of 4719 Calzada De Tlalpan, Tlalpan, Mexico.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 6,461 occupational health testing laboratories worldwide

See the full list, filter by size, metro and specialty, and access 31,596 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Occupational health testing laboratories worldwide at a glance

As of Nov 6, 2026
17.4%Verified-email coverage
28.1Average contacts per company
11-50Median size (employees)
2.0%Largest-city concentration · Sao Paulo
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
2,658
11-50
2,478
51-200
857
201-500
219
501-1,000
76
1,001-5,000
62
5,001-10,000
11
10001+
10

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for occupational health testing laboratories are linked below.
What qualifies
Company records worldwide whose business descriptions match “occupational health testing laboratories” 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. 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 31,596 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 November 6, 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.

Occupational health testing laboratories by location

22 lists · largest first

Every Occupational health testing laboratories list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 “occupational health testing laboratories”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many occupational health testing laboratories are there worldwide?

RevenueBase identified 6,461 company matches for occupational health testing laboratories worldwide as of November 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?

Quest Diagnostics tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most occupational health testing laboratories?

Brazil leads with 1,393 companies, followed by the United States (1,137) and India (381). Every occupational health testing laboratories list by country and city is linked on this page.

Which city has the most occupational health testing laboratories?

Sao Paulo leads with 132 company records, followed by Lima (42) and Rio De Janeiro (41).

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 31,596 professional contacts with verified work emails tracked across these 6,461 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 November 6, 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.