Healthcare Insights
Top clinical laboratories by medical lab procedure volume
Clinical medical laboratories are healthcare facilities that provide a wide range of laboratory procedures that help healthcare providers (HCP) diagnose, treat, and manage patient health. These facilities may also be referred to as medical testing labs.
Below, we’ve listed the top 20 clinical medical laboratories in the U.S. by procedure volume. The data is from the Definitive Healthcare PhysicianView and Atlas All-Payor Claims products for the calendar year 2022.
| Rank | Billing facility | Facility NPI | Facility city | Facility state | % of total 2022 clinical lab procedure volume | Explore dataset |
|---|---|---|---|---|---|---|
| 1 | Unilab Corporation | 1366479099 | WEST HILLS | CA | 6.90% | Explore |
| 2 | Quest Diagnostics Incorporated | 1932145778 | CLIFTON | NJ | 5.10% | Explore |
| 3 | Clinical Pathology Laboratories, Inc. | 1194769497 | AUSTIN | TX | 3.50% | Explore |
| 4 | Empire City Laboratories, Inc | 1053584482 | BROOKLYN | NY | 2.50% | Explore |
| 5 | Quest Diagnostics Clinical Laboratories Inc | 1891731626 | TAMPA | FL | 2.40% | Explore |
| 6 | Laboratory Corporation of America | 1659352276 | SAN DIEGO | CA | 2.20% | Explore |
| 7 | Laboratory Corporation of America Holdings | 1063497451 | RARITAN | NJ | 1.90% | Explore |
| 8 | Bioreference Health, LLC | 1134277494 | ELMWOOD PARK | NJ | 1.80% | Explore |
| 9 | Quest Diagnostics Clinical Laboratories Inc | 1790721538 | IRVING | TX | 1.70% | Explore |
| 10 | Quest Diagnostics LLC IL | 1881630614 | WOOD DALE | IL | 1.50% | Explore |
| 11 | Healthtrackrx Indiana, Inc | 1689639544 | DENTON | TX | 1.40% | Explore |
| 12 | Laboratory Corporation of America Holdings | 1538144910 | BURLINGTON | NC | 1.40% | Explore |
| 13 | Quest Diagnostics Clinical Laboratories Inc | 1518903350 | MIRAMAR | FL | 1.30% | Explore |
| 14 | Accu Reference Medical Lab, LLC | 1225110497 | LINDEN | NJ | 1.20% | Explore |
| 15 | Quest Diagnostics Clinical Laboratories Inc | 1932166386 | TUCKER | GA | 1.20% | Explore |
| 16 | Millennium Health, LLC | 1497933162 | SAN DIEGO | CA | 1.20% | Explore |
| 17 | Unilab Corporation | 1619913449 | SACRAMENTO | CA | 1.10% | Explore |
| 18 | Labone LLC | 1609812445 | LENEXA | KS | 1.00% | Explore |
| 19 | Centers Lab NJ LLC | 1598315574 | CEDAR KNOLLS | NJ | 1.00% | Explore |
| 20 | Sunrise Medical Laboratories, Inc. | 1376587113 | HICKSVILLE | NY | 0.90% | Explore |
Fig. 1 Data is from the Definitive Healthcare PhysicianView and Atlas All-Payor Claims products for calendar year 2022. Claims data is sourced from multiple medical clearinghouses in the U.S. and is updated monthly. Data accessed June 2023.
What is the top clinical medical laboratory?
Unilab Corporation, headquartered in West Hills, California, was the top clinical medical laboratory by procedure volume in 2022. This lab performed 6.9% of all clinical laboratory procedures.
In second place is Quest Diagnostics Incorporated. Quest Diagnostics in Clifton, New Jersey performed 5.1% of all lab procedures in 2022.
Clinical Pathology Laboratories, Inc. was the third top clinical medical laboratory in 2022, performing 3.5% of all clinical lab procedures.
The list of these 20 clinical medical laboratories is representative of where testing is billed and does not include collection sites. While laboratory testing is not exclusively performed in these clinical medical laboratories, these labs are the most prevalent vendors for handling large volumes of testing procedures.
Some laboratory companies, such as Quest Diagnostics, Laboratory Corporation of America, and Unilab Corporation appear in this list multiple times with different locations due to different NPI numbers.
What role do clinical laboratories play in healthcare?
Clinical laboratories are typically situated in or near hospital facilities and perform tests on specimens collected from patients.
Data reports from the laboratories are entered into a laboratory information system (LIS) which is a platform that processes, manages, and stores the patients’ lab data. The LIS can send orders for analysis, receive test orders, check test quality, track orders and results, and send results to EHR systems for providers and patients to access.
Clinical lab technicians, those who collect and test patient samples, are a crucial part of the care team and help diagnose health conditions based on the test sample.
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