Company lists · Data refreshed November 2026
Top 25 Workplace testing services based in the United States
RevenueBase identified 1,178 company matches for workplace testing services associated with the United States as of November 2026 and tracks 69,218 professional contacts across them, including 11,601 with verified work emails. Houston is the largest hub.
This list covers company matches for workplace testing services associated with the United States, 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.
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.
The 25 largest workplace testing services based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 | |||||
| 2 | 1,729 contacts → | ||||
Exact match “Leidos QTC Health Services collaborates closely with government and non-government customers to address current and future program needs within the health services domain.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 1,520 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 | |||||
| 4 | 1,415 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 | |||||
| 5 | 910 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 | |||||
| 6 | 738 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 | |||||
| 7 | 716 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 692 contacts → | ||||
Exact match “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.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 626 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 | |||||
| 10 | 503 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 | |||||
| 11 | 448 contacts → | ||||
Exact match “For over 30 years, The IMA Group has been dedicated to enhancing the livelihood and productivity of individuals and organizations navigating challenging periods of health, work…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 446 contacts → | ||||
Exact match “Pathology Associates Medical Laboratories (PAML) is a full-service medical reference laboratory located in Spokane, WA.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 431 contacts → | ||||
Exact match “We are a clinical diagnostic laboratory offering over accessible, responsive, and reliable lab tests for physicians, hospitals, patients, and employers in our communities.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 427 contacts → | ||||
Exact match “NMS Labs has been setting the standard for excellence in clinical toxicology and forensic testing-responding to the needs of healthcare providers, medical researchers, coroners…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 398 contacts → | ||||
Exact match “DLS is proud to be Hawaii’s largest locally-owned clinical and anatomic pathology testing laboratory with a team of over dedicated professionals.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 382 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 382 contacts → | ||||
Exact match “Accu Reference Medical Lab is a state-of-the-art medical testing laboratory service that provides a complete range of tests for diagnosis, screening or evaluation of diseases and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 353 contacts → | ||||
Exact match “ARCpoint Labs is a trusted industry leader serving our communities with drug, alcohol, DNA, and clinical testing solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 344 contacts → | ||||
Exact match “Headquartered in Asheville, N.C, Genova Diagnostics is a global specialty clinical laboratory, pioneering a systems approach that supports healthcare providers in the personalized…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 331 contacts → | ||||
Exact match “For over 25 years, Dominion Diagnostics has been advancing patient care through trusted diagnostics as a premier urine drug testing and toxicology laboratory.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 326 contacts → | ||||
Exact match “Watch our video on the history and culture of Pace at https://goo.gl/L3ruD3 or get a more detailed look through our company brochure at https://goo.gl/feMDwU!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 320 contacts → | ||||
Exact match “Established in Toledo, Ohio in 1946, Pathology Laboratories, Inc.(PathLabs) fostered a reputation among the area’s private medical practitioners as a provider of prompt, reliable…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 317 contacts → | ||||
Exact match “Examinetics is the leading provider of occupational health solutions, offering services across the entire employee lifecycle with several delivery methods.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 24 | 270 contacts → | ||||
Exact match “Universal Background provides industry leading people insights to safety sensitive organizations in a simplified experience through our best-in-class background screening, drug…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 25 | 259 contacts → | ||||
Exact match “Precision Diagnostics is the only U.S.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “workplace testing services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 1,178 workplace testing services based in the United States
See the full list, filter by size, metro and specialty, and access 11,601 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Workplace testing services based in the United States at a glance
As of Nov 6, 2026Companies by employee count
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 1,178 companies.
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.
- What qualifies
- Company records associated with the United States whose business descriptions match “workplace testing services” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 11,601 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.
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 “workplace testing services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many workplace testing services are there based in the United States?
RevenueBase identified 1,178 company matches for workplace testing services associated with the United States 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 city has the most workplace testing services?
Houston leads with 23 company records, followed by Atlanta (18) and Tampa (11).
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 11,601 professional contacts with verified work emails tracked across these 1,178 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.
Ready to reach these companies? Verified emails and direct dials for all 1,178 workplace testing services based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Workplace testing services by geography
- Workplace testing services based in Sao Paulo, Brazil
- Workplace testing services based in Australia
- Workplace testing services based in Brazil
- Workplace testing services based in Canada
- Workplace testing services based in Chile
- Workplace testing services based in Colombia
- Workplace testing services based in Germany
- Workplace testing services based in India
- Workplace testing services based in Italy
- Workplace testing services based in Mexico
- Workplace testing services based in Peru
- Workplace testing services based in the United Kingdom
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Workplace testing services based in Sao Paulo, Brazil
- Workplace testing services based in Australia
- Workplace testing services based in Brazil
- Workplace testing services based in Canada
- Workplace testing services based in Chile
- Workplace testing services based in Colombia
Company intelligence · public preview
Top 25 workplace testing services based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,178 matching company records for workplace testing services based in the United States, with 69,218 tracked contacts and 11,601 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 workplace testing services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Quest Diagnosticsquestdiagnostics.comHQ: Secaucus, NJ, United StatesReported employees: 10001+ | Secaucus, NJ, United States | 10001+ | Exact match | 30,147 contacts → |
“Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  QTC Management, INCqtcm.comHQ: Glendora, TN, United StatesReported employees: 1,001-5,000 | Glendora, TN, United States | 1,001-5,000 | Exact match | 1,729 contacts → |
“Leidos QTC Health Services collaborates closely with government and non-government customers to address current and future program needs within the health services domain.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Bioreferencebioreference.comHQ: Elmwood Park, NJ, United StatesReported employees: 1,001-5,000 | Elmwood Park, NJ, United States | 1,001-5,000 | Exact match | 1,520 contacts → |
“For more than four decades, BioReference has built a legacy based on scientific excellence, innovation and world-class service in laboratory testing solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Examone, A Quest Diagnostics Companyexamone.comHQ: Lenexa, KS, United StatesReported employees: 1,001-5,000 | Lenexa, KS, United States | 1,001-5,000 | Exact match | 1,415 contacts → |
“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 description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Disa Global Solutions, INCdisa.comHQ: Houston, TX, United StatesReported employees: 1,001-5,000 | Houston, TX, United States | 1,001-5,000 | Exact match | 910 contacts → |
“DISA has been providing full-service employee screening solutions since 1987.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Aegis Sciences Corporationaegislabs.comHQ: Nashville, TN, United StatesReported employees: 501-1,000 | Nashville, TN, United States | 501-1,000 | Exact match | 738 contacts → |
“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 description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Tricore Reference Laboratoriestricore.orgHQ: Albuquerque, NM, United StatesReported employees: 1,001-5,000 | Albuquerque, NM, United States | 1,001-5,000 | Exact match | 716 contacts → |
“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…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Solstas LAB Partnerssolstas.comHQ: Greensboro, GA, United StatesReported employees: 1,001-5,000 | Greensboro, GA, United States | 1,001-5,000 | Exact match | 692 contacts → |
“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.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Millennium Healthmillenniumhealth.comHQ: San Diego, CA, United StatesReported employees: 501-1,000 | San Diego, CA, United States | 501-1,000 | Exact match | 626 contacts → |
“Millennium Health is an accredited specialty laboratory with over a decade of experience delivering timely, accurate, clinically-actionable information through our nationwide…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Clinical Reference Laboratorycrlcorp.comHQ: Lenexa, KS, United StatesReported employees: 501-1,000 | Lenexa, KS, United States | 501-1,000 | Exact match | 503 contacts → |
“CRL was originally founded as Enzyme Technologies in 1979 with our focus on clinical research and development.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  The IMA Grouptheimagroup.comHQ: Tarrytown, NY, United StatesReported employees: 1,001-5,000 | Tarrytown, NY, United States | 1,001-5,000 | Exact match | 448 contacts → |
“For over 30 years, The IMA Group has been dedicated to enhancing the livelihood and productivity of individuals and organizations navigating challenging periods of health, work…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  PAMLpaml.comHQ: Spokane, WA, United StatesReported employees: 1,001-5,000 | Spokane, WA, United States | 1,001-5,000 | Exact match | 446 contacts → |
“Pathology Associates Medical Laboratories (PAML) is a full-service medical reference laboratory located in Spokane, WA.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Compunet Clinical Laboratoriescompunetlab.comHQ: Moraine, OH, United StatesReported employees: 501-1,000 | Moraine, OH, United States | 501-1,000 | Exact match | 431 contacts → |
“We are a clinical diagnostic laboratory offering over accessible, responsive, and reliable lab tests for physicians, hospitals, patients, and employers in our communities.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  NMS Labsnmslabs.comHQ: Horsham, PA, United StatesReported employees: 201-500 | Horsham, PA, United States | 201-500 | Exact match | 427 contacts → |
“NMS Labs has been setting the standard for excellence in clinical toxicology and forensic testing-responding to the needs of healthcare providers, medical researchers, coroners…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Diagnostic Laboratory Servicesdlslab.comHQ: Aiea, HI, United StatesReported employees: 1,001-5,000 | Aiea, HI, United States | 1,001-5,000 | Exact match | 398 contacts → |
“DLS is proud to be Hawaii’s largest locally-owned clinical and anatomic pathology testing laboratory with a team of over dedicated professionals.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Sunrise Medical Laboratoriessunriselab.comHQ: Hicksville, NY, United StatesReported employees: 501-1,000 | Hicksville, NY, United States | 501-1,000 | Exact match | 382 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 17 |  Accu Reference Medical LABaccureference.comHQ: Linden, NJ, United StatesReported employees: 501-1,000 | Linden, NJ, United States | 501-1,000 | Exact match | 382 contacts → |
“Accu Reference Medical Lab is a state-of-the-art medical testing laboratory service that provides a complete range of tests for diagnosis, screening or evaluation of diseases and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Arcpoint Labsarcpointlabs.comHQ: Greenville, SC, United StatesReported employees: 201-500 | Greenville, SC, United States | 201-500 | Exact match | 353 contacts → |
“ARCpoint Labs is a trusted industry leader serving our communities with drug, alcohol, DNA, and clinical testing solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Genova Diagnosticsgdx.netHQ: Asheville, FL, United StatesReported employees: 201-500 | Asheville, FL, United States | 201-500 | Exact match | 344 contacts → |
“Headquartered in Asheville, N.C, Genova Diagnostics is a global specialty clinical laboratory, pioneering a systems approach that supports healthcare providers in the personalized…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Dominion Diagnosticsdomdiag.comHQ: North Kingstown, RI, United StatesReported employees: 201-500 | North Kingstown, RI, United States | 201-500 | Exact match | 331 contacts → |
“For over 25 years, Dominion Diagnostics has been advancing patient care through trusted diagnostics as a premier urine drug testing and toxicology laboratory.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Pace Analyticalpacelabs.comHQ: Minneapolis, MN, United StatesReported employees: 1,001-5,000 | Minneapolis, MN, United States | 1,001-5,000 | Exact match | 326 contacts → |
“Watch our video on the history and culture of Pace at https://goo.gl/L3ruD3 or get a more detailed look through our company brochure at https://goo.gl/feMDwU!” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Pathology Laboratories, INCpathlabs.orgHQ: Toledo, OH, United StatesReported employees: 201-500 | Toledo, OH, United States | 201-500 | Exact match | 320 contacts → |
“Established in Toledo, Ohio in 1946, Pathology Laboratories, Inc.(PathLabs) fostered a reputation among the area’s private medical practitioners as a provider of prompt, reliable…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Examineticsexaminetics.comHQ: Overland Park, KS, United StatesReported employees: 201-500 | Overland Park, KS, United States | 201-500 | Exact match | 317 contacts → |
“Examinetics is the leading provider of occupational health solutions, offering services across the entire employee lifecycle with several delivery methods.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Universal Background Screeninguniversalbackground.comHQ: Phoenix, FL, United StatesReported employees: 201-500 | Phoenix, FL, United States | 201-500 | Exact match | 270 contacts → |
“Universal Background provides industry leading people insights to safety sensitive organizations in a simplified experience through our best-in-class background screening, drug…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Precision Diagnosticsprecisiondxlab.comHQ: San Diego, CA, United StatesReported employees: 501-1,000 | San Diego, CA, United States | 501-1,000 | Exact match | 259 contacts → |
“Precision Diagnostics is the only U.S.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,178 company matches
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Workplace testing services: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,172 records in the displayed employee bands.
6 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,178 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for workplace testing services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many workplace testing services did RevenueBase find based in the United States?
The saved snapshot records 1,178 matching company records, 69,218 tracked contacts and 11,601 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Workplace testing services by geography
- Workplace testing services based in Sao Paulo, Brazil
- Workplace testing services based in Australia
- Workplace testing services based in Brazil
- Workplace testing services based in Canada
- Workplace testing services based in Chile
- Workplace testing services based in Colombia
- Workplace testing services based in Germany
- Workplace testing services based in India
- Workplace testing services based in Italy
- Workplace testing services based in Mexico
- Workplace testing services based in Peru
- Workplace testing services based in the United Kingdom
Cite this list
RevenueBase Data Team. Top 25 workplace testing services based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/workplace-testing-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Workplace testing services based in Sao Paulo, Brazil
- Workplace testing services based in Australia
- Workplace testing services based in Brazil
- Workplace testing services based in Canada
- Workplace testing services based in Chile
- Workplace testing services based in Colombia
Company intelligence · public preview
Top 25 workplace testing services based in the United States
RevenueBase records 1,178 matching company records for workplace testing services based in the United States, with 69,218 tracked contacts and 11,601 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 workplace testing services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Quest Diagnosticsquestdiagnostics.com HQ: Secaucus, NJ, United StatesReported employees: 10001+ | Secaucus, NJ, United States | 10001+ | Exact match | 30,147 contacts → |
“Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | QTC Management, INCqtcm.com HQ: Glendora, TN, United StatesReported employees: 1,001-5,000 | Glendora, TN, United States | 1,001-5,000 | Exact match | 1,729 contacts → |
“Leidos QTC Health Services collaborates closely with government and non-government customers to address current and future program needs within the health services domain.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Bioreferencebioreference.com HQ: Elmwood Park, NJ, United StatesReported employees: 1,001-5,000 | Elmwood Park, NJ, United States | 1,001-5,000 | Exact match | 1,520 contacts → |
“For more than four decades, BioReference has built a legacy based on scientific excellence, innovation and world-class service in laboratory testing solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Examone, A Quest Diagnostics Companyexamone.com HQ: Lenexa, KS, United StatesReported employees: 1,001-5,000 | Lenexa, KS, United States | 1,001-5,000 | Exact match | 1,415 contacts → |
“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 description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Disa Global Solutions, INCdisa.com HQ: Houston, TX, United StatesReported employees: 1,001-5,000 | Houston, TX, United States | 1,001-5,000 | Exact match | 910 contacts → |
“DISA has been providing full-service employee screening solutions since 1987.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Aegis Sciences Corporationaegislabs.com HQ: Nashville, TN, United StatesReported employees: 501-1,000 | Nashville, TN, United States | 501-1,000 | Exact match | 738 contacts → |
“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 description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Tricore Reference Laboratoriestricore.org HQ: Albuquerque, NM, United StatesReported employees: 1,001-5,000 | Albuquerque, NM, United States | 1,001-5,000 | Exact match | 716 contacts → |
“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…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Solstas LAB Partnerssolstas.com HQ: Greensboro, GA, United StatesReported employees: 1,001-5,000 | Greensboro, GA, United States | 1,001-5,000 | Exact match | 692 contacts → |
“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.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Millennium Healthmillenniumhealth.com HQ: San Diego, CA, United StatesReported employees: 501-1,000 | San Diego, CA, United States | 501-1,000 | Exact match | 626 contacts → |
“Millennium Health is an accredited specialty laboratory with over a decade of experience delivering timely, accurate, clinically-actionable information through our nationwide…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Clinical Reference Laboratorycrlcorp.com HQ: Lenexa, KS, United StatesReported employees: 501-1,000 | Lenexa, KS, United States | 501-1,000 | Exact match | 503 contacts → |
“CRL was originally founded as Enzyme Technologies in 1979 with our focus on clinical research and development.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | The IMA Grouptheimagroup.com HQ: Tarrytown, NY, United StatesReported employees: 1,001-5,000 | Tarrytown, NY, United States | 1,001-5,000 | Exact match | 448 contacts → |
“For over 30 years, The IMA Group has been dedicated to enhancing the livelihood and productivity of individuals and organizations navigating challenging periods of health, work…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | PAMLpaml.com HQ: Spokane, WA, United StatesReported employees: 1,001-5,000 | Spokane, WA, United States | 1,001-5,000 | Exact match | 446 contacts → |
“Pathology Associates Medical Laboratories (PAML) is a full-service medical reference laboratory located in Spokane, WA.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Compunet Clinical Laboratoriescompunetlab.com HQ: Moraine, OH, United StatesReported employees: 501-1,000 | Moraine, OH, United States | 501-1,000 | Exact match | 431 contacts → |
“We are a clinical diagnostic laboratory offering over accessible, responsive, and reliable lab tests for physicians, hospitals, patients, and employers in our communities.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | NMS Labsnmslabs.com HQ: Horsham, PA, United StatesReported employees: 201-500 | Horsham, PA, United States | 201-500 | Exact match | 427 contacts → |
“NMS Labs has been setting the standard for excellence in clinical toxicology and forensic testing-responding to the needs of healthcare providers, medical researchers, coroners…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Diagnostic Laboratory Servicesdlslab.com HQ: Aiea, HI, United StatesReported employees: 1,001-5,000 | Aiea, HI, United States | 1,001-5,000 | Exact match | 398 contacts → |
“DLS is proud to be Hawaii’s largest locally-owned clinical and anatomic pathology testing laboratory with a team of over dedicated professionals.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Sunrise Medical Laboratoriessunriselab.com HQ: Hicksville, NY, United StatesReported employees: 501-1,000 | Hicksville, NY, United States | 501-1,000 | Exact match | 382 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 17 | Accu Reference Medical LABaccureference.com HQ: Linden, NJ, United StatesReported employees: 501-1,000 | Linden, NJ, United States | 501-1,000 | Exact match | 382 contacts → |
“Accu Reference Medical Lab is a state-of-the-art medical testing laboratory service that provides a complete range of tests for diagnosis, screening or evaluation of diseases and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Arcpoint Labsarcpointlabs.com HQ: Greenville, SC, United StatesReported employees: 201-500 | Greenville, SC, United States | 201-500 | Exact match | 353 contacts → |
“ARCpoint Labs is a trusted industry leader serving our communities with drug, alcohol, DNA, and clinical testing solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Genova Diagnosticsgdx.net HQ: Asheville, FL, United StatesReported employees: 201-500 | Asheville, FL, United States | 201-500 | Exact match | 344 contacts → |
“Headquartered in Asheville, N.C, Genova Diagnostics is a global specialty clinical laboratory, pioneering a systems approach that supports healthcare providers in the personalized…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Dominion Diagnosticsdomdiag.com HQ: North Kingstown, RI, United StatesReported employees: 201-500 | North Kingstown, RI, United States | 201-500 | Exact match | 331 contacts → |
“For over 25 years, Dominion Diagnostics has been advancing patient care through trusted diagnostics as a premier urine drug testing and toxicology laboratory.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Pace Analyticalpacelabs.com HQ: Minneapolis, MN, United StatesReported employees: 1,001-5,000 | Minneapolis, MN, United States | 1,001-5,000 | Exact match | 326 contacts → |
“Watch our video on the history and culture of Pace at https://goo.gl/L3ruD3 or get a more detailed look through our company brochure at https://goo.gl/feMDwU!” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Pathology Laboratories, INCpathlabs.org HQ: Toledo, OH, United StatesReported employees: 201-500 | Toledo, OH, United States | 201-500 | Exact match | 320 contacts → |
“Established in Toledo, Ohio in 1946, Pathology Laboratories, Inc.(PathLabs) fostered a reputation among the area’s private medical practitioners as a provider of prompt, reliable…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Examineticsexaminetics.com HQ: Overland Park, KS, United StatesReported employees: 201-500 | Overland Park, KS, United States | 201-500 | Exact match | 317 contacts → |
“Examinetics is the leading provider of occupational health solutions, offering services across the entire employee lifecycle with several delivery methods.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Universal Background Screeninguniversalbackground.com HQ: Phoenix, FL, United StatesReported employees: 201-500 | Phoenix, FL, United States | 201-500 | Exact match | 270 contacts → |
“Universal Background provides industry leading people insights to safety sensitive organizations in a simplified experience through our best-in-class background screening, drug…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Precision Diagnosticsprecisiondxlab.com HQ: San Diego, CA, United StatesReported employees: 501-1,000 | San Diego, CA, United States | 501-1,000 | Exact match | 259 contacts → |
“Precision Diagnostics is the only U.S.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,178 company matches
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Workplace testing services: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,172 records in the displayed employee bands.
6 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,178 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for workplace testing services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many workplace testing services did RevenueBase find based in the United States?
The saved snapshot records 1,178 matching company records, 69,218 tracked contacts and 11,601 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Workplace testing services by geography
- Workplace testing services based in Sao Paulo, Brazil
- Workplace testing services based in Australia
- Workplace testing services based in Brazil
- Workplace testing services based in Canada
- Workplace testing services based in Chile
- Workplace testing services based in Colombia
- Workplace testing services based in Germany
- Workplace testing services based in India
- Workplace testing services based in Italy
- Workplace testing services based in Mexico
- Workplace testing services based in Peru
- Workplace testing services based in the United Kingdom
Cite this list
RevenueBase Data Team. Top 25 workplace testing services based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/workplace-testing-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Workplace testing services based in Sao Paulo, Brazil
- Workplace testing services based in Australia
- Workplace testing services based in Brazil
- Workplace testing services based in Canada
- Workplace testing services based in Chile
- Workplace testing services based in Colombia