Top 100 Contractors in NAICS 621999: All Other Miscellaneous Ambulatory Health Care Services, FY2023

Name: Top 100 Contractors in NAICS 621999: All Other Miscellaneous Ambulatory Health Care Services, FY2023
Creator: GovTribe

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

The top 10 won 67% of FY2023 NAICS 621999 contract dollars

Contract obligations: $702,755,283 Net of deobligations, by contracts coded NAICS 621999
Contractors: 230 Parent companies with an obligation
Largest contractor: STG International, Inc. $127 million, 16.8% 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	STG International, Inc. Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) DOI (Department of the Interior)	$126,746,272	16.8%	Rank history: #1 in FY2021, #4 in FY2022, #1 in FY2024 and #8 in FY2025; up 3 since FY2022.
2	CVS Health Corporation Through CVS Pharmacy, Inc. Top agencies HHS (Department of Health and Human Services)	$120,779,416	16.0%	Rank history: not on the FY2021 list, #2 in FY2022, #4 in FY2024 and not on the FY2025 list; unchanged since FY2022.
3	Walgreen Co. Top agencies HHS (Department of Health and Human Services)	$83,625,000	11.1%	Rank history: not on the FY2021 list, #1 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
4	Ami Expeditionary Healthcare (USA) LLC Top agencies DHS (Department of Homeland Security)	$55,237,016	7.3%	Rank history: not on the FY2021 list, #5 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
5	Anthony & Associates Inc. 2 awardees Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$29,295,203	3.9%	Rank history: #38 in FY2021, #30 in FY2022, #16 in FY2024 and not on the FY2025 list; up 25 since FY2022.
6	Servefed Inc. Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration)	$23,766,945	3.2%	Rank history: #7 in FY2021, #6 in FY2022, #3 in FY2024 and #4 in FY2025; unchanged since FY2022.
7	Dilligas Corp Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$18,125,699	2.4%	Rank history: #36 in FY2021, #12 in FY2022, #12 in FY2024 and #10 in FY2025; up 5 since FY2022.
8	Destiny Management Services, LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$15,127,531	2.0%	Rank history: #11 in FY2021, #17 in FY2022, #6 in FY2024 and #13 in FY2025; up 9 since FY2022.
9	Avosys Technology, Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$14,591,211	1.9%	Rank history: #17 in FY2021, #19 in FY2022, #17 in FY2024 and #20 in FY2025; up 10 since FY2022.
10	Cognito Systems LLC Top agencies Army (Department of the Army)	$14,390,271	1.9%	Rank history: #6 in FY2021, #9 in FY2022, #5 in FY2024 and #7 in FY2025; down 1 since FY2022.
11	CHS Middle East LLC Through Acuity-Chs, LLC Top agencies DHS (Department of Homeland Security)	$12,447,131	1.7%	Rank history: #4 in FY2021, #8 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
12	Health Partner's Management Group, Incorporated Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$11,680,012	1.6%	Rank history: #16 in FY2021, #15 in FY2022, #7 in FY2024 and #11 in FY2025; up 3 since FY2022.
13	CS Holding Inc. Through CG Services LLC Top agencies DHA (Defense Health Agency)	$8,998,009	1.2%	Rank history: #12 in FY2021, #23 in FY2022, #9 in FY2024 and not on the FY2025 list; up 10 since FY2022.
14	Gerald L Ignace Indian Health Center Inc. Top agencies HHS (Department of Health and Human Services)	$8,492,698	1.1%	Rank history: not on the FY2021 list, #27 in FY2022 and not on the FY2024–FY2025 lists; up 13 since FY2022.
15	Koniag, Inc. Through Kadiak LLC Top agencies DHS (Department of Homeland Security)	$8,184,697	1.1%	Rank history: #24 in FY2021, #13 in FY2022, #84 in FY2024 and #17 in FY2025; down 2 since FY2022.
16	T3I, Inc. Top agencies USAF (Department of the Air Force)	$7,684,548	1.0%	Rank history: #13 in FY2021, #25 in FY2022, #10 in FY2024 and #15 in FY2025; up 9 since FY2022.
17	Medforce Government Solutions, Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$6,810,008	0.9%	Rank history: #14 in FY2021, #10 in FY2022, #23 in FY2024 and #29 in FY2025; down 7 since FY2022.
18	Distinctive Spectrum Healthcare Solutions JV LLC 2 awardees Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$6,262,425	0.8%	Rank history: #20 in FY2021, #20 in FY2022, #27 in FY2024 and #28 in FY2025; up 2 since FY2022.
19	Caban Resources LLC 2 awardees Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$6,094,266	0.8%	Rank history: #37 in FY2021, #35 in FY2022, #20 in FY2024 and #22 in FY2025; up 16 since FY2022.
20	Empowered Management Solutions LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$6,056,605	0.8%	Rank history: #9 in FY2021, #11 in FY2022, #18 in FY2024 and not on the FY2025 list; down 9 since FY2022.
21	Quacito LLC Top agencies Army (Department of the Army)	$5,964,613	0.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
22	Stratus Federal Solutions LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$5,726,615	0.8%	Rank history: #62 in FY2021, #65 in FY2022, #21 in FY2024 and #24 in FY2025; up 43 since FY2022.
23	Seattle Indian Health Board Top agencies HHS (Department of Health and Human Services)	$5,545,443	0.7%	Rank history: #18 in FY2021, #26 in FY2022, #19 in FY2024 and #21 in FY2025; up 3 since FY2022.
24	Forensic Drug & Alcohol Testing LLC 2 awardees Top agencies DOT (Department of Transportation) NRC (Nuclear Regulatory Commission) DHS (Department of Homeland Security)	$5,087,076	0.7%	Rank history: #34 in FY2021, #28 in FY2022, #15 in FY2024 and #18 in FY2025; up 4 since FY2022.
25	Defense Health Professionals LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$4,680,826	0.6%	Rank history: #23 in FY2021, #24 in FY2022, #25 in FY2024 and #35 in FY2025; down 1 since FY2022.
26	The Chenega Corporation 3 awardees, including Chenega Healthcare Services LLC, American Hospital Services Group LLC and Chenega Reliable Services LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force)	$4,416,159	0.6%	Rank history: #21 in FY2021, #44 in FY2022 and not on the FY2024–FY2025 lists; up 18 since FY2022.
27	Standard Technology, Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$4,171,748	0.6%	Rank history: #22 in FY2021, #29 in FY2022, #22 in FY2024 and #80 in FY2025; up 2 since FY2022.
28	General Infomatics-A Service Disabled Owned Veteran Business, Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) Army (Department of the Army)	$3,783,481	0.5%	Rank history: #33 in FY2021, #42 in FY2022, #50 in FY2024 and #37 in FY2025; up 14 since FY2022.
29	Indian Health Board of Minneapolis, Inc. Top agencies HHS (Department of Health and Human Services)	$3,342,273	0.4%	Rank history: not on the FY2021 list, #7 in FY2022 and not on the FY2024–FY2025 lists; down 22 since FY2022.
30	Modern Healthcare Services JV LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$3,133,394	0.4%	Rank history: #27 in FY2021, #34 in FY2022, #34 in FY2024 and #34 in FY2025; up 4 since FY2022.
31	Arapaho Technical Services LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$2,839,170	0.4%	Rank history: #31 in FY2021, #36 in FY2022, #13 in FY2024 and #14 in FY2025; up 5 since FY2022.
32	Goldbelt Apex, LLC Top agencies Army (Department of the Army)	$2,789,111	0.4%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2024 and not on the FY2025 list; new.
33	Mindleaf Technologies Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$2,771,994	0.4%	Rank history: #26 in FY2021, #21 in FY2022, #68 in FY2024 and not on the FY2025 list; down 12 since FY2022.
34	The Native American Rehabilitation Association of the Northwest, Incorporated Top agencies HHS (Department of Health and Human Services)	$2,645,402	0.4%	Rank history: #30 in FY2021, #40 in FY2022, #36 in FY2024 and #33 in FY2025; up 6 since FY2022.
35	Abbott Laboratories Through Pembrooke Occupational Health, Inc. Top agencies DOI (Department of the Interior) DOE (Department of Energy) DOJ (Department of Justice)	$2,074,107	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
36	Native American Development Corp Top agencies HHS (Department of Health and Human Services)	$2,050,726	0.3%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2024 and #39 in FY2025; new.
37	The Native Project Top agencies HHS (Department of Health and Human Services)	$1,966,425	0.3%	Rank history: #44 in FY2021, #46 in FY2022, #40 in FY2024 and #38 in FY2025; up 9 since FY2022.
38	Indian Health Center of Santa Clara Valley Top agencies HHS (Department of Health and Human Services)	$1,944,154	0.3%	Rank history: #10 in FY2021, #45 in FY2022, #44 in FY2024 and #45 in FY2025; up 7 since FY2022.
39	American Indian Health and Family Services of Southeastern MI, Inc. Top agencies HHS (Department of Health and Human Services)	$1,852,792	0.2%	Rank history: not on the FY2021 list, #22 in FY2022 and not on the FY2024–FY2025 lists; down 17 since FY2022.
40	Fresno American Indian Health Project Top agencies HHS (Department of Health and Human Services)	$1,825,033	0.2%	Rank history: #15 in FY2021, #52 in FY2022, #52 in FY2024 and #50 in FY2025; up 12 since FY2022.
41	Akahi Ingenesis Partners LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$1,749,237	0.2%	Rank history: #46 in FY2021, #39 in FY2022, #61 in FY2024 and #76 in FY2025; down 2 since FY2022.
42	Katmai Commodities, LLC Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$1,707,529	0.2%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2024 and #46 in FY2025; new.
43	Urban Indian Center of Salt Lake Top agencies HHS (Department of Health and Human Services)	$1,663,977	0.2%	Rank history: not on the FY2021 list, #32 in FY2022, #45 in FY2024 and #44 in FY2025; down 11 since FY2022.
44	D7, LLC Top agencies Army (Department of the Army)	$1,524,828	0.2%	Rank history: #50 in FY2021, #47 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
45	American Indian Association of Tucson, Inc. Top agencies HHS (Department of Health and Human Services)	$1,509,624	0.2%	Rank history: #59 in FY2021, #18 in FY2022, #48 in FY2024 and #43 in FY2025; down 27 since FY2022.
46	Erprosource360 LLC Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$1,477,716	0.2%	Rank history: #45 in FY2021, #43 in FY2022, #78 in FY2024 and not on the FY2025 list; down 3 since FY2022.
47	Hsg, LLC Top agencies NASA (National Aeronautics and Space Administration)	$1,458,587	0.2%	Rank history: #49 in FY2021, #56 in FY2022, #77 in FY2024 and not on the FY2025 list; up 9 since FY2022.
48	American Indian Health Service of Chicago Top agencies HHS (Department of Health and Human Services)	$1,411,952	0.2%	Rank history: not on the FY2021 list, #14 in FY2022 and not on the FY2024–FY2025 lists; down 34 since FY2022.
49	James Executive Consultant Group LLC Top agencies DHA (Defense Health Agency)	$1,395,808	0.2%	Rank history: not on the FY2021 list, #49 in FY2022, #79 in FY2024 and not on the FY2025 list; unchanged since FY2022.
50	Fidelity Partners Services LLC Top agencies Army (Department of the Army)	$1,382,669	0.2%	Rank history: not on the FY2021 list, #48 in FY2022, #53 in FY2024 and #48 in FY2025; down 2 since FY2022.
51	Chickasaw Nation Through CNI Professional Services LLC Top agencies USAF (Department of the Air Force)	$1,333,921	0.2%	Rank history: #55 in FY2021, #60 in FY2022 and not on the FY2024–FY2025 lists; up 9 since FY2022.
52	Apogee Solutions Inc Top agencies Navy (Department of the Navy)	$1,271,418	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
53	Beat LLC Through Business Enabled Acquisition and Technology, Inc. Top agencies DHA (Defense Health Agency)	$1,217,656	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
54	Capital MED Group LLC Top agencies DOJ (Department of Justice)	$1,212,396	0.2%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2024 and #59 in FY2025; new.
55	Godwin Corp Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$1,190,478	0.2%	Rank history: #76 in FY2021, #66 in FY2022, #67 in FY2024 and #64 in FY2025; up 11 since FY2022.
56	Precision Monitoring LLC Top agencies VA (Department of Veterans Affairs)	$1,151,790	0.2%	Rank history: #65 in FY2021, #59 in FY2022, #57 in FY2024 and not on the FY2025 list; up 3 since FY2022.
57	Katmai Resource Management LLC Top agencies Army (Department of the Army)	$1,079,444	0.1%	Rank history: not on the FY2021 list, #64 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
58	Chickasaw Management Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$1,001,661	0.1%	Rank history: #58 in FY2021, #58 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
59	D2 Government Solutions, Inc. Top agencies Army (Department of the Army)	$912,167	0.1%	Rank history: #92 in FY2021, #93 in FY2022 and not on the FY2024–FY2025 lists; up 34 since FY2022.
60	Dt-Trak Consulting, Inc. Top agencies HHS (Department of Health and Human Services)	$891,912	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #55 in FY2025; new.
61	Johnson Venture Management Solutions, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$890,195	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
62	Bay Area Anesthesia LLC Top agencies HHS (Department of Health and Human Services)	$889,492	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #100 in FY2025; new.
63	2Srg LLC Top agencies DOE (Department of Energy)	$837,473	0.1%	Rank history: #71 in FY2021, #76 in FY2022, #71 in FY2024 and not on the FY2025 list; up 13 since FY2022.
64	Eagle Health, LLC Top agencies DHA (Defense Health Agency)	$821,567	0.1%	Rank history: #35 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; down 31 since FY2022.
65	Vergence LLC Top agencies Army (Department of the Army)	$802,644	0.1%	Rank history: #63 in FY2021, #78 in FY2022, #63 in FY2024 and #58 in FY2025; up 13 since FY2022.
66	Maat Enterprises Inc. Top agencies HHS (Department of Health and Human Services)	$801,720	0.1%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2024 and not on the FY2025 list; new.
67	Innovative Systems Group of Florida, Inc. Top agencies Army (Department of the Army) DODEA (Department of Defense Education Activity)	$781,110	0.1%	Rank history: not on the FY2021 list, #73 in FY2022, #60 in FY2024 and #65 in FY2025; up 6 since FY2022.
68	Quest Diagnostics Incorporated Through Quest Diagnostics Clinical Laboratories, Inc. Top agencies DOI (Department of the Interior) DOJ (Department of Justice) DHS (Department of Homeland Security)	$755,449	0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2024 and not on the FY2025 list; new.
69	Compass Medical Provider LLC Top agencies Army (Department of the Army)	$740,667	0.1%	Rank history: #64 in FY2021, #62 in FY2022, #90 in FY2024 and not on the FY2025 list; down 7 since FY2022.
70	Legacy Ems Inc. Top agencies HHS (Department of Health and Human Services)	$734,674	0.1%	Rank history: not on the FY2021 list, #79 in FY2022 and not on the FY2024–FY2025 lists; up 9 since FY2022.
71	Bgesh Incorporated Top agencies USAF (Department of the Air Force)	$715,960	0.1%	Rank history: not on the FY2021 list, #88 in FY2022, #72 in FY2024 and #72 in FY2025; up 17 since FY2022.
72	Leading Solutions, LLC Top agencies Navy (Department of the Navy)	$667,702	0.1%	Rank history: #84 in FY2021, not on the FY2022 list, #91 in FY2024 and #89 in FY2025; up 64 since FY2022.
73	National Marrow Donor Program Top agencies VA (Department of Veterans Affairs)	$667,431	0.1%	Rank history: #2 in FY2021, #37 in FY2022, #88 in FY2024 and #62 in FY2025; down 36 since FY2022.
74	JYG Innovations LLC Top agencies USAF (Department of the Air Force)	$666,240	0.1%	Rank history: #66 in FY2021, #70 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
75	Acc3 International Incorporated Top agencies VA (Department of Veterans Affairs)	$644,490	0.1%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2024 and not on the FY2025 list; new.
76	Surgical Neuromonitoring Associates, Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$587,111	0.1%	Rank history: not on the FY2021 list, #71 in FY2022, #81 in FY2024 and #75 in FY2025; down 5 since FY2022.
77	Naphcare LLC Top agencies DOJ (Department of Justice)	$551,547	0.1%	Rank history: #32 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
78	Quality Staffing Solutions Inc. Top agencies DODEA (Department of Defense Education Activity)	$494,765	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 80 since FY2022.
79	American Medical Response Inc. 2 awardees, including American Medical Response Mid-Atlantic, Inc. Top agencies Army (Department of the Army)	$482,018	0.1%	Rank history: #8 in FY2021, #83 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
80	Boston Scientific Corp Top agencies VA (Department of Veterans Affairs)	$474,925	0.1%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2024 and #94 in FY2025; new.
81	Pafford Medical Services, Inc. Top agencies Army (Department of the Army)	$464,300	0.1%	Rank history: #53 in FY2021, #57 in FY2022 and not on the FY2024–FY2025 lists; down 24 since FY2022.
82	Venesco LLC Top agencies Army (Department of the Army)	$440,670	0.1%	Rank history: not on the FY2021 list, #85 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
83	Medical Faculty Associates, Inc. Top agencies Peace Corps	$395,493	0.1%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2024 and not on the FY2025 list; new.
84	Shadowbox Consulting Associates LLC Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) USSOCOM (United States Special Operations Command)	$395,443	0.1%	Rank history: #52 in FY2021, not on the FY2022 list, not on the FY2024 list and #91 in FY2025; up 30 since FY2022.
85	Mitchell Consulting Services Group Inc Top agencies HHS (Department of Health and Human Services)	$383,520	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
86	Agiliti Health Inc Top agencies VA (Department of Veterans Affairs)	$374,880	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
87	EGA Associates, LLC Top agencies VA (Department of Veterans Affairs)	$372,715	<0.1%	Rank history: not on the FY2021 list, #92 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
88	Windwalker Group LLC Top agencies Army (Department of the Army)	$370,026	<0.1%	Rank history: #90 in FY2021, #91 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
89	Sacramento Native American Health Center Inc. Top agencies HHS (Department of Health and Human Services)	$362,531	<0.1%	Rank history: #83 in FY2021, #96 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
90	Epicc Vascular of Nashville LLC Through Line Science LLC Top agencies VA (Department of Veterans Affairs)	$343,550	<0.1%	Rank history: #94 in FY2021, #89 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
91	Dawson Cms, LLC Top agencies Army (Department of the Army)	$338,142	<0.1%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2024 and #9 in FY2025; new.
92	Bfrench Consulting LLC Top agencies USAF (Department of the Air Force)	$336,330	<0.1%	Rank history: not on the FY2021 list, #94 in FY2022, #75 in FY2024 and #74 in FY2025; up 2 since FY2022.
93	Ozark Medical Inc. Top agencies VA (Department of Veterans Affairs)	$335,283	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	New Beginnings Medical Surveillance, Inc. Top agencies Army (Department of the Army)	$315,252	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
95	Echelon Services, LLC Top agencies Army (Department of the Army)	$312,000	<0.1%	Rank history: #80 in FY2021, #84 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
96	Giacare Inc. Top agencies Army (Department of the Army)	$301,805	<0.1%	Rank history: not on the FY2021 list, #99 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
97	Anders Group LLC Top agencies HHS (Department of Health and Human Services)	$273,600	<0.1%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2024 and not on the FY2025 list; up 31 since FY2022.
98	Essnova Solutions, Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$264,643	<0.1%	Rank history: not on the FY2021 list, #100 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
99	North South Consulting Group LLC Top agencies Army (Department of the Army)	$263,267	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 6 since FY2022.
100	Ghost RX Inc. Top agencies VA (Department of Veterans Affairs)	$257,670	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.

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100 of 230 contractors listed here. See the rest on GovTribe.

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 $753 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 621999 contractors in FY2023?

1. STG International, Inc. ($127M), 2. CVS Health Corporation ($121M), 3. Walgreen Co. ($83.6M), 4. Ami Expeditionary Healthcare (USA) LLC ($55.2M), 5. Anthony & Associates Inc. ($29.3M), 6. Servefed Inc. ($23.8M), 7. Dilligas Corp ($18.1M), 8. Destiny Management Services, LLC ($15.1M), 9. Avosys Technology, Inc. ($14.6M), 10. Cognito Systems LLC ($14.4M).

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