Top 100 Contractors in NAICS 6215: Medical and Diagnostic Laboratories, FY2023

Name: Top 100 Contractors in NAICS 6215: Medical and Diagnostic Laboratories, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 56% of FY2023 NAICS 6215 contract dollars

Contract obligations: $496,461,978 Net of deobligations, by contracts coded NAICS 6215 or a code under it
Contractors: 558 Parent companies with an obligation
Largest contractor: Quest Diagnostics Incorporated $140 million, 17.7% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Quest Diagnostics Incorporated 11 awardees, including Ameripath Inc., Athena Diagnostics, Inc. and Diagnostic Laboratory of Oklahoma LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$139,577,228	17.7%	Rank history: #5 in FY2021, #4 in FY2022, #2 in FY2024 and #2 in FY2025; up 3 since FY2022.
2	Laboratory Corporation of America 4 awardees, including Labcorp Oklahoma Inc. and Monogram Biosciences, Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$137,168,370	17.4%	Rank history: #14 in FY2021, #8 in FY2022, #1 in FY2024 and #1 in FY2025; up 6 since FY2022.
3	Helix Opco LLC Top agencies HHS (Department of Health and Human Services)	$45,475,768	5.8%	Rank history: #15 in FY2021, #6 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
4	Laboratory Corporation of America Holdings 7 awardees, including Center for Disease Detection, LLC and Laboratory Corporation of America Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) Army (Department of the Army)	$31,134,487	3.9%	Rank history: #4 in FY2021, #3 in FY2022, #72 in FY2024 and #48 in FY2025; down 1 since FY2022.
5	Roche Diabetes Care Inc Through Foundation Medicine, Inc. Top agencies VA (Department of Veterans Affairs)	$19,078,100	2.4%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2024 and not on the FY2025 list; new.
6	SNA International LLC Top agencies WHS (DOD Washington Headquarters Service)	$15,305,513	1.9%	Rank history: not on the FY2021 list, #11 in FY2022, #4 in FY2024 and #5 in FY2025; up 5 since FY2022.
7	Valor Network, Inc. Top agencies DHA (Defense Health Agency) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$14,532,050	1.8%	Rank history: #24 in FY2021, #12 in FY2022, #5 in FY2024 and #4 in FY2025; up 5 since FY2022.
8	Ansible Government Solutions LLC Top agencies VA (Department of Veterans Affairs)	$14,135,961	1.8%	Rank history: not on the FY2021 list, #69 in FY2022, #6 in FY2024 and not on the FY2025 list; up 61 since FY2022.
9	MCI Diagnostic Center LLC Top agencies DOL (Department of Labor) Army (Department of the Army) VA (Department of Veterans Affairs)	$13,744,915	1.7%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2024 and not on the FY2025 list; up 379 since FY2022.
10	The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. Top agencies DHA (Defense Health Agency)	$11,068,141	1.4%	Rank history: #25 in FY2021, #16 in FY2022, #12 in FY2024 and #7 in FY2025; up 6 since FY2022.
11	Loyal Source Government Services LLC Top agencies USAF (Department of the Air Force)	$11,007,051	1.4%	Rank history: #16 in FY2021, #15 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
12	University of Utah 2 awardees, including Arup Laboratories Inc. Top agencies VA (Department of Veterans Affairs)	$10,386,264	1.3%	Rank history: #23 in FY2021, #17 in FY2022, #53 in FY2024 and not on the FY2025 list; up 5 since FY2022.
13	Mayo Clinic Through Mayo Collaborative Services, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$7,191,681	0.9%	Rank history: #19 in FY2021, #22 in FY2022, #17 in FY2024 and not on the FY2025 list; up 9 since FY2022.
14	Abbott Laboratories 4 awardees, including Pembrooke Occupational Health, Inc., Alere Toxicology Services, Inc. and Abbott Rapid Diagnostics Informatics, Inc. Top agencies OSD (Office of the Secretary of Defense) DOI (Department of the Interior) DOT (Department of Transportation)	$6,402,003	0.8%	Rank history: #30 in FY2021, #18 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
15	Intertrade International Services SA Top agencies Army (Department of the Army)	$5,903,542	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
16	Government Imaging Services LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$5,104,058	0.6%	Rank history: #33 in FY2021, #21 in FY2022, #10 in FY2024 and #15 in FY2025; up 5 since FY2022.
17	Rite Aid Corporation Through Rite Aid Hdqtrs. Corp. Top agencies HHS (Department of Health and Human Services)	$4,924,976	0.6%	Rank history: #2 in FY2021, #5 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
18	Northern Plains Laboratory LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$4,276,250	0.5%	Rank history: #35 in FY2021, #28 in FY2022, #18 in FY2024 and #16 in FY2025; up 10 since FY2022.
19	Macrogen, Inc. Through Psomagen Inc. Top agencies HHS (Department of Health and Human Services)	$3,850,000	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 83 since FY2022.
20	Research Triangle Institute Top agencies HHS (Department of Health and Human Services)	$3,704,822	0.5%	Rank history: not on the FY2021 list, #35 in FY2022, #76 in FY2024 and #91 in FY2025; up 15 since FY2022.
21	Advanced Imaging Management, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$3,600,524	0.5%	Rank history: #47 in FY2021, #36 in FY2022 and not on the FY2024–FY2025 lists; up 15 since FY2022.
22	Neogenomics Laboratories, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$3,364,462	0.4%	Rank history: #60 in FY2021, #73 in FY2022 and not on the FY2024–FY2025 lists; up 51 since FY2022.
23	Mystic Ventures Group LLC Top agencies VA (Department of Veterans Affairs)	$3,121,463	0.4%	Rank history: #38 in FY2021, #44 in FY2022, #22 in FY2024 and #22 in FY2025; up 21 since FY2022.
24	Redhawk Group International, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$3,085,251	0.4%	Rank history: not on the FY2021 list, #40 in FY2022, #62 in FY2024 and #27 in FY2025; up 16 since FY2022.
25	CVS Health Corporation 2 awardees, including Minuteclinic, L.L.C. Top agencies EOP (Executive Office of the President)	$3,039,980	0.4%	Rank history: #7 in FY2021, #2 in FY2022 and not on the FY2024–FY2025 lists; down 23 since FY2022.
26	Exact Sciences Corporation 2 awardees, including Genomic Health, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) USAF (Department of the Air Force)	$3,012,247	0.4%	Rank history: #20 in FY2021, #60 in FY2022, #30 in FY2024 and #30 in FY2025; up 34 since FY2022.
27	Shared Medical Services Inc. Top agencies VA (Department of Veterans Affairs)	$2,979,524	0.4%	Rank history: not on the FY2021 list, #50 in FY2022, #24 in FY2024 and #31 in FY2025; up 23 since FY2022.
28	Diagnostic Imaging Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$2,931,682	0.4%	Rank history: #44 in FY2021, #31 in FY2022, #21 in FY2024 and #24 in FY2025; up 3 since FY2022.
29	The Tatitlek Corporation Through Tatitlek Federal Services LLC Top agencies Army (Department of the Army)	$2,754,643	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
30	Banner Health 2 awardees, including Sonora Quest Laboratories LLC Top agencies HHS (Department of Health and Human Services)	$2,627,806	0.3%	Rank history: #29 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; up 13 since FY2022.
31	Cherokee Nation Operational Solutions, L.L.C. Top agencies HHS (Department of Health and Human Services)	$2,611,751	0.3%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2024 and #28 in FY2025; new.
32	Riverside Radiology and Interventional Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$2,513,461	0.3%	Rank history: #55 in FY2021, #37 in FY2022, #29 in FY2024 and not on the FY2025 list; up 5 since FY2022.
33	Caredx, Inc. 2 awardees, including Caredx Lab Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$2,474,454	0.3%	Rank history: not on the FY2021 list, #49 in FY2022, #73 in FY2024 and #19 in FY2025; up 16 since FY2022.
34	Radiology Professional Management, LLC Top agencies VA (Department of Veterans Affairs)	$2,473,047	0.3%	Rank history: #65 in FY2021, #62 in FY2022, #36 in FY2024 and not on the FY2025 list; up 28 since FY2022.
35	Oregon Health & Science University Top agencies VA (Department of Veterans Affairs)	$2,167,809	0.3%	Rank history: #31 in FY2021, #55 in FY2022, #28 in FY2024 and #23 in FY2025; up 20 since FY2022.
36	Fulgent Genetics, Inc. Through Fulgent Therapeutics LLC Top agencies VA (Department of Veterans Affairs)	$2,166,760	0.3%	Rank history: #10 in FY2021, #20 in FY2022, #13 in FY2024 and #11 in FY2025; down 16 since FY2022.
37	Preventiongenetics LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$2,119,903	0.3%	Rank history: #41 in FY2021, #77 in FY2022 and not on the FY2024–FY2025 lists; up 40 since FY2022.
38	Labcorp Oklahoma Inc. Top agencies HHS (Department of Health and Human Services)	$1,960,481	0.2%	Rank history: not on the FY2021–FY2022 lists, #40 in FY2024 and #25 in FY2025; new.
39	Danaher Corporation 4 awardees, including Cepheid, Beckman Coulter Gesellschaft MIT Beschraenkter Haftung and Beckman Coulter, Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) DHS (Department of Homeland Security)	$1,918,114	0.2%	Rank history: #36 in FY2021, #76 in FY2022, #51 in FY2024 and #53 in FY2025; up 37 since FY2022.
40	Tempus AI, Inc. Top agencies VA (Department of Veterans Affairs)	$1,887,322	0.2%	Rank history: not on the FY2021 list, #23 in FY2022, #8 in FY2024 and #14 in FY2025; down 17 since FY2022.
41	Insight Health Corp. Top agencies VA (Department of Veterans Affairs)	$1,747,513	0.2%	Rank history: #90 in FY2021, #65 in FY2022, #37 in FY2024 and not on the FY2025 list; up 24 since FY2022.
42	Biobridge Global Through Qualtex Laboratories Top agencies DHA (Defense Health Agency)	$1,632,057	0.2%	Rank history: #51 in FY2021, #54 in FY2022 and not on the FY2024–FY2025 lists; up 12 since FY2022.
43	Appddictionstudio Limited Liability Company Top agencies USAF (Department of the Air Force)	$1,628,263	0.2%	Rank history: #59 in FY2021, #58 in FY2022 and not on the FY2024–FY2025 lists; up 15 since FY2022.
44	Sonic Healthcare Limited 4 awardees, including Cytopath Biopsy Lab Inc., Propath Services, LLC and Bioscientia Institut FÜR Medizinische Diagnostik GMBH Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,541,818	0.2%	Rank history: #69 in FY2021, #70 in FY2022 and not on the FY2024–FY2025 lists; up 26 since FY2022.
45	State of California Controllers Office 10 awardees, including California Department of Public Health, The Regents of the University of California. San Francisco and Ucla Department of Pathology & Laboratory Medicine Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$1,537,478	0.2%	Rank history: #45 in FY2021, #39 in FY2022, #49 in FY2024 and not on the FY2025 list; down 6 since FY2022.
46	Creative Testing Solutions Top agencies DHA (Defense Health Agency)	$1,536,019	0.2%	Rank history: #54 in FY2021, #25 in FY2022, #31 in FY2024 and #21 in FY2025; down 21 since FY2022.
47	Dt-Trak Consulting, Inc. Top agencies HHS (Department of Health and Human Services)	$1,518,425	0.2%	Rank history: #73 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
48	Ibex It Business Experts LLC Top agencies DHA (Defense Health Agency)	$1,447,142	0.2%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2024 and #42 in FY2025; new.
49	University of Pittsburgh Medical Center Through Upmc Presbyterian Shadyside Top agencies VA (Department of Veterans Affairs)	$1,387,835	0.2%	Rank history: #46 in FY2021, #47 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
50	All Valley Imaging, L.l.c Top agencies HHS (Department of Health and Human Services)	$1,355,440	0.2%	Rank history: #64 in FY2021, #56 in FY2022, #46 in FY2024 and #66 in FY2025; up 6 since FY2022.
51	Vanderbelt University Medical Center Through Vanderbilt University Medical Center Top agencies VA (Department of Veterans Affairs)	$1,297,497	0.2%	Rank history: #77 in FY2021, #57 in FY2022, #69 in FY2024 and not on the FY2025 list; up 6 since FY2022.
52	White Mountain Radiology, P.L.L.C. Top agencies HHS (Department of Health and Human Services)	$1,246,626	0.2%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2024 and #45 in FY2025; up 165 since FY2022.
53	Med-Share Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$1,239,280	0.2%	Rank history: #82 in FY2021, #61 in FY2022, #81 in FY2024 and #55 in FY2025; up 8 since FY2022.
54	University of Wisconsin System 2 awardees, including University of Wisconsin Hospitals and Clinics Authority Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,231,088	0.2%	Rank history: not on the FY2021 list, #84 in FY2022, #43 in FY2024 and not on the FY2025 list; up 30 since FY2022.
55	Brigham & Womens Hospital Inc 4 awardees, including The General Hospital Corporation and Massachusetts General Physicians Organization, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$1,188,655	0.2%	Rank history: not on the FY2021 list, #87 in FY2022, #66 in FY2024 and #87 in FY2025; up 32 since FY2022.
56	Arizona State University Top agencies HHS (Department of Health and Human Services)	$1,175,853	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
57	Cardionet Inc. 2 awardees Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,114,500	0.1%	Rank history: #68 in FY2021, #90 in FY2022 and not on the FY2024–FY2025 lists; up 33 since FY2022.
58	Bestica, Inc. Top agencies USAF (Department of the Air Force)	$1,074,468	0.1%	Rank history: #72 in FY2021, #72 in FY2022 and not on the FY2024–FY2025 lists; up 14 since FY2022.
59	Amprion, Inc. Top agencies HHS (Department of Health and Human Services)	$1,064,800	0.1%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2024 and #81 in FY2025; new.
60	Oklahoma Blood Institute Top agencies VA (Department of Veterans Affairs)	$1,063,296	0.1%	Rank history: #67 in FY2021, #67 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
61	Somalogic Operating Co., Inc. Top agencies HHS (Department of Health and Human Services)	$1,047,800	0.1%	Rank history: #62 in FY2021, #100 in FY2022 and not on the FY2024–FY2025 lists; up 39 since FY2022.
62	American Type Culture Collection Top agencies HHS (Department of Health and Human Services)	$1,026,671	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 135 since FY2022.
63	Genscript USA Inc. Top agencies HHS (Department of Health and Human Services)	$1,026,000	0.1%	Rank history: #71 in FY2021, #68 in FY2022, #61 in FY2024 and #60 in FY2025; up 5 since FY2022.
64	Peninsula Histopathology Laboratory Inc. Top agencies VA (Department of Veterans Affairs)	$1,020,675	0.1%	Rank history: not on the FY2021 list, #89 in FY2022, #94 in FY2024 and #88 in FY2025; up 25 since FY2022.
65	Veracyte, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,003,187	0.1%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2024 and #44 in FY2025; up 48 since FY2022.
66	Physicians Laboratory, P.C. Top agencies VA (Department of Veterans Affairs)	$997,880	0.1%	Rank history: not on the FY2021 list, #53 in FY2022, #71 in FY2024 and #56 in FY2025; down 13 since FY2022.
67	Clinical Imaging Systems, Inc. Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$958,865	0.1%	Rank history: not on the FY2021 list, #92 in FY2022, #65 in FY2024 and not on the FY2025 list; up 25 since FY2022.
68	Incyte Pathology, P.S Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$958,717	0.1%	Rank history: not on the FY2021 list, #71 in FY2022, not on the FY2024 list and #85 in FY2025; up 3 since FY2022.
69	Genomedx Biosciences Corp. Through Veracyte Labs SD Corporation Top agencies VA (Department of Veterans Affairs)	$957,751	0.1%	Rank history: #53 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 263 since FY2022.
70	Regents of the University of Michigan Top agencies VA (Department of Veterans Affairs)	$940,334	0.1%	Rank history: #89 in FY2021, not on the FY2022 list, #60 in FY2024 and #71 in FY2025; up 51 since FY2022.
71	IS Healthcare LLC Top agencies VA (Department of Veterans Affairs)	$905,002	0.1%	Rank history: #56 in FY2021, #52 in FY2022, #52 in FY2024 and #41 in FY2025; down 19 since FY2022.
72	Winergy LLC Top agencies VA (Department of Veterans Affairs)	$844,477	0.1%	Rank history: #85 in FY2021, #96 in FY2022 and not on the FY2024–FY2025 lists; up 24 since FY2022.
73	QPS Austria GMBH Top agencies HHS (Department of Health and Human Services)	$821,359	0.1%	Rank history: not on the FY2021 list, #88 in FY2022 and not on the FY2024–FY2025 lists; up 15 since FY2022.
74	Cerba Research USA Inc. Top agencies HHS (Department of Health and Human Services)	$812,131	0.1%	Rank history: not on the FY2021 list, #51 in FY2022 and not on the FY2024–FY2025 lists; down 23 since FY2022.
75	Queen'S Health Systems the 2 awardees, including Diagnostic Laboratory Services, Inc. and The Queen's Medical Center Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$790,436	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 32 since FY2022.
76	Iowa Pathology Associates, P.C. Top agencies VA (Department of Veterans Affairs)	$745,003	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #61 in FY2025; new.
77	Trinity Health Corporation 2 awardees, including Loyola University Health System and Mercy Medical Center - Clinton, Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$741,424	0.1%	Rank history: #86 in FY2021, not on the FY2022 list, #50 in FY2024 and not on the FY2025 list; up 303 since FY2022.
78	The American National Red Cross 2 awardees Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$720,673	0.1%	Rank history: #87 in FY2021, #83 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
79	Vitalant Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$713,400	0.1%	Rank history: #78 in FY2021, #82 in FY2022, not on the FY2024 list and #29 in FY2025; up 3 since FY2022.
80	Othram Inc. Top agencies DOI (Department of the Interior)	$709,540	0.1%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2024 and not on the FY2025 list; new.
81	Cepheid Top agencies HHS (Department of Health and Human Services)	$685,300	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 232 since FY2022.
82	Central TOX LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$636,081	0.1%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2024 and #83 in FY2025; up 28 since FY2022.
83	Digirad Corporation 2 awardees, including DMS Health Technologies Inc. and DMS Imaging, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$630,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
84	Bloodworks Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$629,670	0.1%	Rank history: #52 in FY2021, #81 in FY2022, #90 in FY2024 and #37 in FY2025; down 3 since FY2022.
85	Koninklijke Philips N.V. Through Cardionet, LLC Top agencies VA (Department of Veterans Affairs)	$629,396	0.1%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2024 and not on the FY2025 list; new.
86	JMG Veteran Contracting LLC Top agencies VA (Department of Veterans Affairs)	$621,500	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 81 since FY2022.
87	Sophia Genetics Inc. Top agencies USAF (Department of the Air Force)	$613,420	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #74 in FY2025; new.
88	Bronze Star Industries, Inc. Top agencies HHS (Department of Health and Human Services)	$604,800	0.1%	Rank history: #92 in FY2021, #95 in FY2022, #99 in FY2024 and not on the FY2025 list; up 7 since FY2022.
89	Mdxhealth Inc. Top agencies VA (Department of Veterans Affairs)	$601,767	0.1%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2024 and #95 in FY2025; new.
90	Transportation North Carolina Department of Through Dhhs State Public Health Lab Top agencies DHA (Defense Health Agency)	$588,720	0.1%	Rank history: not on the FY2021 list, #78 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
91	The University of Iowa Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$568,052	0.1%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2024 and #65 in FY2025; up 59 since FY2022.
92	Hamamatsu / Queen's Pet Imaging Center, LLC Top agencies DHA (Defense Health Agency)	$545,454	0.1%	Rank history: #97 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 41 since FY2022.
93	Yale New Haven Health Services Corporation Through Yale New Haven Hospital, Inc. Top agencies VA (Department of Veterans Affairs)	$540,996	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 16 since FY2022.
94	National Medical Services, Inc. Top agencies HHS (Department of Health and Human Services)	$536,207	0.1%	Rank history: not on the FY2021–FY2022 lists, #85 in FY2024 and #79 in FY2025; up 61 since FY2022.
95	Rprd Diagnostics, LLC Top agencies HHS (Department of Health and Human Services)	$520,661	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
96	South Central Pathology Lab Pa Top agencies VA (Department of Veterans Affairs)	$508,856	0.1%	Rank history: not on the FY2021 list, #80 in FY2022, #93 in FY2024 and #63 in FY2025; down 16 since FY2022.
97	Virginia Polytechnic Institute & State University Through Department of General Services Virginia Top agencies DHA (Defense Health Agency)	$496,800	0.1%	Rank history: #98 in FY2021, not on the FY2022 list, #75 in FY2024 and not on the FY2025 list; up 18 since FY2022.
98	Natera Inc. Top agencies VA (Department of Veterans Affairs)	$496,460	0.1%	Rank history: not on the FY2021 list, #32 in FY2022, #91 in FY2024 and not on the FY2025 list; down 66 since FY2022.
99	American Veteran Contracting Solutions LLC Top agencies VA (Department of Veterans Affairs)	$468,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2024 and #100 in FY2025; up 12 since FY2022.
100	The Chenega Corporation Through Chenega Tri-Services, LLC Top agencies DHA (Defense Health Agency)	$464,061	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 17 since FY2022.

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100 of 558 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 6215

Code	Net obligations	Largest contractor
62151 Medical and Diagnostic Laboratories	$496,461,978	Quest Diagnostics Incorporated

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $790 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2023 ran Oct 1, 2022 – Sep 30, 2023. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2022. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2022 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 6215 contractors in FY2023?

1. Quest Diagnostics Incorporated ($140M), 2. Laboratory Corporation of America ($137M), 3. Helix Opco LLC ($45.5M), 4. Laboratory Corporation of America Holdings ($31.1M), 5. Roche Diabetes Care Inc ($19.1M), 6. SNA International LLC ($15.3M), 7. Valor Network, Inc. ($14.5M), 8. Ansible Government Solutions LLC ($14.1M), 9. MCI Diagnostic Center LLC ($13.7M), 10. The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. ($11.1M).

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