Company lists · Data refreshed September 2026

Top 25 Clinical laboratory staffing companies based in the United States

Name: Clinical laboratory staffing companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 2,534 companies tracked

RevenueBase identified 2,534 clinical laboratory staffing companies headquartered in the United States as of September 2026 and tracks 140,403 professional contacts across them, including 20,338 with verified work emails. New York is the largest hub.

This list covers clinical laboratory staffing 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 27, 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 27, 2026 86% judged on-target in blind review

2,534Companies

140,403Contacts tracked

20,338Verified emails

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The 25 largest clinical laboratory staffing companies based in the United States

Ranked by team size

Top 25 of 2,534 clinical laboratory staffing companies based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to clinical laboratory staffing 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Quest Diagnostics	Indirect evidence	Secaucus, NJ, United StatesHQ checked Sep 27, 2026	10001+	27,884 contacts →
	Indirect evidence “Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes.” Source: RevenueBase Database · checked Sep 27, 2026
2	AYA Healthcare	Partial evidence	San Diego, CA, United StatesHQ checked Sep 27, 2026	5,001-10,000	19,247 contacts →
	Partial evidence “Aya Healthcare is the largest healthcare talent software and staffing company in the United States.” Source: RevenueBase Database · checked Sep 27, 2026
3	Aureus Medical Group	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 27, 2026	501-1,000	2,529 contacts →
	Indirect evidence “Aureus Medical Group® is now Medical Solutions.” Source: RevenueBase Database · checked Sep 27, 2026
4	Barton Associates	Partial evidence	Peabody, MA, United StatesHQ checked Sep 27, 2026	501-1,000	1,829 contacts →
	Partial evidence “Welcome to Barton Associates, the locum tenens staffing and recruiting experts.” Source: RevenueBase Database · checked Sep 27, 2026
5	Bioreference	Partial evidence	Elmwood Park, NJ, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,610 contacts →
	Partial evidence “For more than four decades, BioReference has built a legacy based on scientific excellence, innovation and world-class service in laboratory testing solutions.” Source: RevenueBase Database · checked Sep 27, 2026
6	Weatherby Healthcare	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 27, 2026	n/a	1,597 contacts →
	Partial evidence “Founded in 1995, Weatherby Healthcare has established itself as a leading expert in locum tenens staffing for physicians, physician assistants, and nurse practitioners.” Source: RevenueBase Database · checked Sep 27, 2026
7	Triage Staffing Healthcare Staffing	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 27, 2026	n/a	1,538 contacts →
	Indirect evidence “In recruiting, stating actual facts has become: Foreign \| Uncommon \| Taboo.” Source: RevenueBase Database · checked Sep 27, 2026
8	Clinical Pathology Laboratories	Strong evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,528 contacts →
	Strong evidence “Clinical Pathology Laboratories (CPL) is a medically-led company dating back to 1948.” Source: RevenueBase Database · checked Sep 27, 2026
9	Flexcare	Indirect evidence	Roseville, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,264 contacts →
	Indirect evidence “At FlexCare, we know that solving healthcare talent challenges isn’t just about filling roles-it’s about building sustainable solutions that drive better patient care, stronger…” Source: RevenueBase Database · checked Sep 27, 2026
10	Sonora Quest Laboratories Laboratory Sciences Of Arizona	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,222 contacts →
	Partial evidence “Sonora Quest Laboratories, a subsidiary of Laboratory Sciences of Arizona, is an Arizona-based joint venture between Banner Health and Quest Diagnostics (NYSE: DGX) that makes up…” Source: RevenueBase Database · checked Sep 27, 2026
11	locumtenens.com	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 27, 2026	501-1,000	1,171 contacts →
	Partial evidence “LocumTenens.com specializes in optimizing healthcare staffing operations.” Source: RevenueBase Database · checked Sep 27, 2026
12	Totalmed	Partial evidence	Appleton, WI, United StatesHQ checked Sep 27, 2026	201-500	1,170 contacts →
	Partial evidence “TotalMed provides temporary, contract, and full time staffing services to hospitals, medical groups, health plans, and life sciences companies who require staffing assistance in…” Source: RevenueBase Database · checked Sep 27, 2026
13	Planet Pharma	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,088 contacts →
	Partial evidence “Founded in 2012, Planet Pharma is a global leader in life sciences recruitment and staffing, specializing in Pharmaceuticals, Biotechnology, Medical Device, Labs & Healthcare…” Source: RevenueBase Database · checked Sep 27, 2026
14	LRS Healthcare	Partial evidence	Omaha, NE, United StatesHQ checked Sep 27, 2026	201-500	969 contacts →
	Partial evidence “Founded in 2006, LRS Healthcare is a leading provider of medical staffing.” Source: RevenueBase Database · checked Sep 27, 2026
15	Imcs Group	Partial evidence	Irving, TX, United StatesHQ checked Sep 27, 2026	201-500	881 contacts →
	Partial evidence “IMCS Group is an IT, Healthcare, and Professional Staffing Company that helps Enterprises optimize the business value of their Staffing investments and enables them to achieve…” Source: RevenueBase Database · checked Sep 27, 2026
16	Medpro Healthcare Staffing	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 27, 2026	501-1,000	855 contacts →
	Partial evidence “MedPro Healthcare Staffing is a Joint Commission certified, leading provider of temporary and contract staffing services to healthcare facilities throughout the United States.” Source: RevenueBase Database · checked Sep 27, 2026
17	Integrated Resources, INC IRI	Partial evidence	Edison, NJ, United StatesHQ checked Sep 27, 2026	501-1,000	762 contacts →
	Partial evidence “Integrated Resources Inc.(IRI) is a professional staffing firm specializing in contract, consulting & full time positions in the area of Information Technology, Life Science and…” Source: RevenueBase Database · checked Sep 27, 2026
18	ALL Medical Personnel	Indirect evidence	Hollywood, FL, United StatesHQ checked Sep 27, 2026	n/a	687 contacts →
	Indirect evidence “We Help You Help People.” Source: RevenueBase Database · checked Sep 27, 2026
19	Careerstaff Unlimited	Indirect evidence	Irving, TX, United StatesHQ checked Sep 27, 2026	5,001-10,000	654 contacts →
	Indirect evidence “Our team of healthcare experts can help you meet business objectives, such as improved retention, quality, reporting, and cost effectiveness for per diem, contract, travel, or…” Source: RevenueBase Database · checked Sep 27, 2026
20	Epic Staffing Group	Partial evidence	El Segundo, CA, United StatesHQ checked Sep 27, 2026	501-1,000	651 contacts →
	Partial evidence “Epic Staffing Group is a diversified national provider of staffing services to the Life Sciences and Healthcare industries.” Source: RevenueBase Database · checked Sep 27, 2026
21	Solstas LAB Partners	Partial evidence	Greensboro, NC, United StatesHQ checked Sep 27, 2026	1,001-5,000	649 contacts →
	Partial evidence “Solstas Lab Partners has become one of the nation’s fastest-growing and largest full-service laboratories because we understand that our business is more than just test results.” Source: RevenueBase Database · checked Sep 27, 2026
22	Malone Workforce Solutions	Indirect evidence	Louisville, KY, United StatesHQ checked Sep 27, 2026	201-500	646 contacts →
	Indirect evidence “Malone takes care of business by taking care of people.” Source: RevenueBase Database · checked Sep 27, 2026
23	Automation Personnel Services, INC	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 27, 2026	10001+	624 contacts →
	Indirect evidence “Automation Personnel Services was founded in Birmingham, AL almost 30 years ago and has expanded coast to coast with 40 Branch offices in eleven states.” Source: RevenueBase Database · checked Sep 27, 2026
24	Alverno Laboratories	Partial evidence	Hammond, IN, United StatesHQ checked Sep 27, 2026	1,001-5,000	619 contacts →
	Partial evidence “Alverno Laboratories manages 32 hospital laboratories and provides laboratory services to two free standing emergency departments and thousands of physician offices and other…” Source: RevenueBase Database · checked Sep 27, 2026
25	Labconnect	Strong evidence	Durham, NC, United StatesHQ checked Sep 27, 2026	501-1,000	610 contacts →
	Strong evidence “LabConnect is a global central laboratory services and clinical trial sample solutions partner, integrating and optimizing sample-related activities across the study lifecycle…” Source: RevenueBase Database · checked Sep 27, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: clinical laboratory staffing companies. 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 clinical laboratory staffing companies.
Partial evidence: Its own public description names part of clinical laboratory staffing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clinical laboratory staffing companies. 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 2,534 clinical laboratory staffing companies based in the United States

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Clinical laboratory staffing companies based in the United States at a glance

As of Sep 27, 2026

14.5%Verified-email coverage

55.4Average contacts per company

11-50Median size (employees)

3.2%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

853

11-50

741

51-200

558

201-500

216

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 2,534 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 clinical laboratory staffing 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 “clinical laboratory staffing 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 clinical laboratory staffing 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 clinical laboratory staffing 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, 20,338 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 27, 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.

Clinical laboratory staffing companies by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names clinical laboratory staffing 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 clinical laboratory staffing companies are there based in the United States?

RevenueBase identified 2,534 clinical laboratory staffing 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?

Quest Diagnostics, headquartered in Secaucus, tops this list with the largest team on record.

Which city has the most clinical laboratory staffing companies?

New York leads with 82 headquartered companies, followed by Houston (60) and Dallas (46).

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 20,338 verified decision-maker contacts tracked across these 2,534 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 27, 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.