Company lists · Data refreshed September 2026
Top 25 Drug testing laboratories worldwide
RevenueBase identified 4,187 drug testing laboratories worldwide as of September 2026 and tracks 191,732 professional contacts across them, including 40,396 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers drug testing laboratories worldwide, 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 19, 2026. Country and city lists for drug testing laboratories follow the table.
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.
The 25 largest drug testing laboratories worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 38,427 contacts → | ||||
Indirect evidence “Clear and confident health care decisions begin with questions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 27,884 contacts → | ||||
Indirect evidence “Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 11,653 contacts → | ||||
Partial evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 3,469 contacts → | ||||
Indirect evidence “LifeLabs is Canada’s leading provider of laboratory diagnostic information and digital health connectivity systems, enabling patients and healthcare practitioners to diagnose…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 2,807 contacts → | ||||
Indirect evidence “We believe that every human being deserves to know the truth about their inner health.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 2,127 contacts → | ||||
Strong evidence “PathCare Laboratories PathCare is a network of pathology laboratories that provide testing of specimens, primarily for medical diagnostic purposes.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,638 contacts → | ||||
Partial evidence “Eurofins Lancaster Laboratories is one of the largest commercial contract laboratories in the world providing comprehensive laboratory services in the pharmaceutical…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1,528 contacts → | ||||
Partial evidence “Clinical Pathology Laboratories (CPL) is a medically-led company dating back to 1948.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1,270 contacts → | ||||
Indirect evidence “Prodia Clinical Laboratory was established in Solo on May 7th, 1973 by a number of pharmacy-based scientists.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,173 contacts → | ||||
Indirect evidence “Established in 1983, Chughtai Lab is the leading diagnostic lab in Pakistan.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 995 contacts → | ||||
Strong evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 954 contacts → | ||||
Indirect evidence “Diagnostyka to więcej dla zdrowia.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 926 contacts → | ||||
Indirect evidence “Neuberg Diagnostics, headquartered in Chennai, is one of India’s leading diagnostic service providers, with its presence in India, UAE, South Africa and USA.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 918 contacts → | ||||
Partial evidence “Alberta Precision Laboratories (APL) is a wholly-owned subsidiary of Alberta Health Services, delivering high-quality, responsive diagnostic lab services across our healthcare…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 865 contacts → | ||||
Indirect evidence “Apollo Diagnostics is part of the Apollo Health and Lifestyle Limited services brought to you by the illustrious Apollo Group.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 834 contacts → | ||||
Indirect evidence “DISA has been providing full-service employee screening solutions since 1987.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 748 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 731 contacts → | ||||
Partial evidence “Referencia Laboratorio Clínico, empresa dedicada al servicio de la salud, tiene como objetivo la obtención de un resultado de análisis clínico confiable, preciso y oportuno…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 701 contacts → | ||||
Indirect evidence “European leader in the sector of specialized medical pathology, Eurofins Biomnis carries out over analyses per day from a range of over 2,500 available tests, including…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 690 contacts → | ||||
Strong 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 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 665 contacts → | ||||
Indirect evidence “Millennium Health is an accredited specialty laboratory with over 15 years of experience delivering timely, accurate, clinically-actionable information through our nationwide…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 657 contacts → | ||||
Partial evidence “Por más de 60 años, en Amadita Laboratorio Clínico nos hemos dedicado a mejorar la salud y el bienestar en la República Dominicana, sirviendo como un ancla de la precisión médica.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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: drug 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 drug testing laboratories.
- Partial evidence
- Its own public description names part of drug testing laboratories, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name drug 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 4,187 drug testing laboratories worldwide
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Drug testing laboratories worldwide at a glance
As of Sep 19, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 drug 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.
- Coverage
- Every country. Country and city lists for drug testing laboratories are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “drug 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 drug 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 drug testing laboratories, and records with no verified work email.
- 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, 40,396 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 19, 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.
Drug testing laboratories by location
13 lists · largest firstEvery Drug testing laboratories list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Drug testing laboratories based in the United States1,147
- Drug testing laboratories based in Brazil876
- Drug testing laboratories based in India296
- Drug testing laboratories based in Italy114
- Drug testing laboratories based in Mexico113
- Drug testing laboratories based in Argentina74
- Drug testing laboratories based in Germany74
- Drug testing laboratories based in France64
- Drug testing laboratories based in the United Kingdom61
- Drug testing laboratories based in Australia44
- Drug testing laboratories based in Chile43
- Drug testing laboratories based in Canada37
- Drug testing laboratories based in Switzerland25
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 drug 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 drug testing laboratories are there worldwide?
RevenueBase identified 4,187 drug testing laboratories worldwide 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 country has the most drug testing laboratories?
The United States leads with 1,147 companies, followed by Brazil (876) and India (296). Every drug testing laboratories list by country and city is linked on this page.
Which city has the most drug testing laboratories?
Sao Paulo leads with 37 headquartered companies, followed by Houston (23) and New Delhi (23).
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 40,396 verified decision-maker contacts tracked across these 4,187 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 19, 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.