Healthcare Insights

Top 20 clinical medical laboratories

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.

The scope of medical laboratory science includes collecting and processing specimens, performing an array of analytical procedures, quality control and reporting on test results.

How many laboratory procedures are performed each year?

Definitive Healthcare tracks laboratory, durable medical equipment (DME) and medical supply orders in our PhysicianView product. This data is a subset of medical claims that capture when providers order additional testing from pathology laboratories or DME for their patients. For this Healthcare Insight, we reviewed more than 911 million claims for laboratory procedures performed in 2021 and grouped them by clinical medical laboratory facility to identify the top 20.

The following are the top clinical medical laboratories by 2021 procedure volume.

2021 Top 20 clinical medical laboratories

RankBilling facilityFacility NPIFacility cityFacility state2021 procedure volumeExplore dataset
1UNILAB CORPORATION1366479099WEST HILLSCA18,871,154Explore
2CLINICAL PATHOLOGY LABORATORIES, INC.1194769497AUSTINTX13,311,523Explore
3LABORATORY CORPORATION OF AMERICA1659352276SAN DIEGOCA7,478,220Explore
4LABORATORY CORPORATION OF AMERICA HOLDINGS1063497451RARITANNJ7,154,279Explore
5BIOREFERENCE HEALTH, LLC1134277494ELMWOOD PARKNJ7,078,004Explore
6LABORATORY CORPORATION OF AMERICA HOLDINGS1538144910BURLINGTONNC6,108,633Explore
7QUEST DIAGNOSTICS INCORPORATED1932145778CLIFTONNJ5,519,215Explore
8ACCU REFERENCE MEDICAL LAB, LLC1225110497LINDENNJ4,878,422Explore
9CENTERS LAB NJ LLC1598315574CEDAR KNOLLSNJ4,448,853Explore
10HEALTHTRACKRX INDIANA, INC1689639544DENTONTX4,058,678Explore
11SEMA4 OPCO, INC1518415991BRANFORDCT3,593,277Explore
12West Coast Medical Diagnostic Services Inc1114431087LOS ANGELESCA3,486,563Explore
13LABORATORY CORPORATION OF AMERICA HOLDINGS1932184322DUBLINOH3,483,926Explore
14SONORA QUEST LABORATORIES, LLC.1538105366PHOENIXAZ3,246,116Explore
15QUEST DIAGNOSTICS CLINICAL LABORATORIES INC1790721538IRVINGTX3,240,870Explore
16PATHGROUP LABS, LLC1235186800NASHVILLETN3,136,800Explore
17EMPIRE CITY LABORATORIES, INC1053584482BROOKLYNNY3,047,612Explore
18LABORATORY CORPORATION OF AMERICA1104829159BURLINGTONNC3,032,196Explore
19OhioHealth Riverside Methodist Hospital1710916945COLUMBUSOH2,993,250Explore
20MILLENNIUM HEALTH, LLC1497933162SAN DIEGOCA2,704,582Explore

Fig. 1 Data from the Definitive Healthcare PhysicianView and ClaimsMx products for calendar year 2021. Claims data is sourced from multiple medical claims clearinghouses in the U.S. and is updated monthly. Data is accurate as of June 2022.

Which clinical medical laboratory performed the most procedures in 2021?

Unilab Corporation, based in West Hills, CA performed the most laboratory procedures in 2021 with almost 19 million total procedures. Clinical Pathology Laboratories, Inc in Austin, TX has the second highest volume of procedures at more than 13 million total procedures performed in 2021. Both facilities performed significantly greater volumes of procedures than the remaining clinical medical laboratories on the top 20 list.

Laboratory Corporation of America holds 5 of the top 20 places on our list due to different NPI numbers. If we combine those 5 site locations, the total volume amounts to over 27 million procedures performed in 2021.

This list is representative of where the testing is performed and not inclusive of the collection site. Laboratory testing is not performed exclusively in these clinical medical laboratories but can also be executed through general acute care hospitals, anatomic pathology & clinical pathology labs and other facility types. However, clinical and medical laboratories are the most prevalent and are capable of handling large volumes.

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