Top 100 Contractors in PSC Q523: Surgery Services, FY2023

Name: Top 100 Contractors in PSC Q523: Surgery Services, FY2023
Creator: GovTribe

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

The top 10 won 39% of FY2023 PSC Q523 contract dollars

Contract obligations: $90,987,991 Net of deobligations, by contracts coded PSC Q523
Contractors: 146 Parent companies with an obligation
Largest contractor: Medstar Health, Inc. $7.65 million, 6.4% 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	Medstar Health, Inc. Through Medstar-Georgetown Medical Center, Inc. Top agencies VA (Department of Veterans Affairs)	$7,652,193	6.4%	Rank history: not on the FY2021–FY2022 lists, #2 in FY2024 and not on the FY2025 list; new.
2	Gift of Hope Organ & Tissue Donor Network Top agencies VA (Department of Veterans Affairs)	$7,091,530	6.0%	Rank history: #8 in FY2021, #13 in FY2022, #3 in FY2024 and #3 in FY2025; up 11 since FY2022.
3	Christus Santa Rosa Health Care Corporation Top agencies VA (Department of Veterans Affairs)	$6,805,584	5.7%	Rank history: #1 in FY2021, #2 in FY2022, #14 in FY2024 and #4 in FY2025; down 1 since FY2022.
4	Vanderbelt University Medical Center Through Vanderbilt University Medical Center Top agencies VA (Department of Veterans Affairs)	$6,406,239	5.4%	Rank history: #2 in FY2021, #1 in FY2022, #9 in FY2024 and not on the FY2025 list; down 3 since FY2022.
5	Neurosurgical Associates of Central New York, LLP Top agencies VA (Department of Veterans Affairs)	$3,724,693	3.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
6	Banner Phoenix Surgery Center, LLC Top agencies VA (Department of Veterans Affairs)	$3,706,991	3.1%	Rank history: not on the FY2021 list, #5 in FY2022, #6 in FY2024 and #16 in FY2025; down 1 since FY2022.
7	Distinctive Health Spectrum Care JV LLC Top agencies DHA (Defense Health Agency)	$3,406,992	2.9%	Rank history: #6 in FY2021, #6 in FY2022, #4 in FY2024 and not on the FY2025 list; down 1 since FY2022.
8	Brigham & Womens Hospital Inc. Top agencies VA (Department of Veterans Affairs)	$2,678,606	2.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
9	Oregon Health & Science University Top agencies VA (Department of Veterans Affairs)	$2,635,012	2.2%	Rank history: #10 in FY2021, #4 in FY2022, #13 in FY2024 and #12 in FY2025; down 5 since FY2022.
10	Medical Faculty Associates, Inc. Top agencies DHA (Defense Health Agency)	$2,554,132	2.1%	Rank history: #7 in FY2021, #11 in FY2022, #11 in FY2024 and #35 in FY2025; up 1 since FY2022.
11	MSI Systems Corp Top agencies VA (Department of Veterans Affairs)	$2,348,082	2.0%	Rank history: not on the FY2021 list, #23 in FY2022, #18 in FY2024 and not on the FY2025 list; up 12 since FY2022.
12	New York University 2 awardees Top agencies VA (Department of Veterans Affairs)	$2,246,243	1.9%	Rank history: #11 in FY2021, #9 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
13	University of Texas System Through The University of Texas Southwestern Medical Center Top agencies VA (Department of Veterans Affairs)	$1,971,474	1.7%	Rank history: #35 in FY2021, not on the FY2022 list, #40 in FY2024 and not on the FY2025 list; returned.
14	Center for Organ Recovery & Education Top agencies VA (Department of Veterans Affairs)	$1,603,487	1.3%	Rank history: #4 in FY2021, #10 in FY2022, #8 in FY2024 and #6 in FY2025; down 4 since FY2022.
15	Beacon Point Associates LLC Top agencies VA (Department of Veterans Affairs)	$1,585,836	1.3%	Rank history: #24 in FY2021, #56 in FY2022, #21 in FY2024 and #21 in FY2025; up 41 since FY2022.
16	University of Washington Top agencies VA (Department of Veterans Affairs)	$1,501,138	1.3%	Rank history: #9 in FY2021, #12 in FY2022, #34 in FY2024 and not on the FY2025 list; down 4 since FY2022.
17	University of Miami Top agencies VA (Department of Veterans Affairs)	$1,261,381	1.1%	Rank history: #46 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
18	Indiana University Health Care Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$1,260,765	1.1%	Rank history: #15 in FY2021, #20 in FY2022, #22 in FY2024 and #23 in FY2025; up 2 since FY2022.
19	CHG Healthcare Services Inc. Through CHG Companies, Inc. Top agencies HHS (Department of Health and Human Services)	$1,212,313	1.0%	Rank history: #65 in FY2021, #26 in FY2022, #38 in FY2024 and not on the FY2025 list; up 7 since FY2022.
20	Dilligas Corp 2 awardees Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$1,179,066	1.0%	Rank history: #39 in FY2021, #19 in FY2022, #23 in FY2024 and #37 in FY2025; down 1 since FY2022.
21	South Carolina State of 2 awardees, including Medical University of South Carolina Top agencies VA (Department of Veterans Affairs)	$1,164,267	1.0%	Rank history: #16 in FY2021, #24 in FY2022, #32 in FY2024 and #20 in FY2025; up 3 since FY2022.
22	Medicus Healthcare Solutions, LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,125,862	0.9%	Rank history: not on the FY2021 list, #54 in FY2022, #20 in FY2024 and not on the FY2025 list; up 32 since FY2022.
23	Circulatory Services Inc. Top agencies VA (Department of Veterans Affairs)	$1,064,540	0.9%	Rank history: #21 in FY2021, #22 in FY2022, #49 in FY2024 and #24 in FY2025; down 1 since FY2022.
24	Mednax Inc. Through Bexar Pediatric Surgery Associates, P.L.L.C. Top agencies Army (Department of the Army)	$1,038,000	0.9%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
25	Wichita Surgical Specialists, P.a. Top agencies VA (Department of Veterans Affairs)	$1,036,142	0.9%	Rank history: #36 in FY2021, #67 in FY2022, #29 in FY2024 and #38 in FY2025; up 42 since FY2022.
26	Indiana University Health, Inc. Top agencies VA (Department of Veterans Affairs)	$965,503	0.8%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2024 and not on the FY2025 list; new.
27	Quacito LLC 2 awardees Top agencies DHA (Defense Health Agency) Army (Department of the Army)	$940,449	0.8%	Rank history: #94 in FY2021, #97 in FY2022, #51 in FY2024 and #54 in FY2025; up 70 since FY2022.
28	Baylor College of Medicine Top agencies VA (Department of Veterans Affairs)	$935,871	0.8%	Rank history: #29 in FY2021, #27 in FY2022, #10 in FY2024 and #15 in FY2025; down 1 since FY2022.
29	Emergency Physicians Medical Group P.C. Through Vista Staffing Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$924,226	0.8%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2024 and not on the FY2025 list; new.
30	The University of Iowa Top agencies VA (Department of Veterans Affairs)	$912,000	0.8%	Rank history: #23 in FY2021, #18 in FY2022, #33 in FY2024 and #33 in FY2025; down 12 since FY2022.
31	Palo Alto Perfusion Services Inc. Top agencies VA (Department of Veterans Affairs)	$900,444	0.8%	Rank history: #28 in FY2021, #25 in FY2022, #28 in FY2024 and #17 in FY2025; down 6 since FY2022.
32	Matrix Providers Inc. Top agencies Army (Department of the Army)	$883,879	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
33	Wake Forest University Through Wake Forest University Health Sciences Top agencies VA (Department of Veterans Affairs)	$867,476	0.7%	Rank history: #33 in FY2021, #55 in FY2022, #30 in FY2024 and not on the FY2025 list; up 22 since FY2022.
34	Posterity Group LLC Top agencies VA (Department of Veterans Affairs)	$836,254	0.7%	Rank history: #30 in FY2021, #30 in FY2022, #41 in FY2024 and #28 in FY2025; down 4 since FY2022.
35	Fortec Medical Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$774,879	0.7%	Rank history: #85 in FY2021, #92 in FY2022, #78 in FY2024 and #58 in FY2025; up 57 since FY2022.
36	University of Maryland Surgical Associates, P.a. Top agencies VA (Department of Veterans Affairs)	$770,539	0.6%	Rank history: not on the FY2021 list, #29 in FY2022, not on the FY2024 list and #66 in FY2025; down 7 since FY2022.
37	The Vanderbilt University Top agencies VA (Department of Veterans Affairs)	$701,245	0.6%	Rank history: #13 in FY2021, #15 in FY2022 and not on the FY2024–FY2025 lists; down 22 since FY2022.
38	Icahn School of Medicine at Mount Sinai Top agencies VA (Department of Veterans Affairs)	$674,516	0.6%	Rank history: not on the FY2021 list, #41 in FY2022, #53 in FY2024 and not on the FY2025 list; up 3 since FY2022.
39	University of Minnesota Physicians Top agencies VA (Department of Veterans Affairs)	$665,044	0.6%	Rank history: #20 in FY2021, #47 in FY2022, #71 in FY2024 and #26 in FY2025; up 8 since FY2022.
40	Nuvance Health Through Vassar Brothers Hospital Top agencies VA (Department of Veterans Affairs)	$651,493	0.5%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #55 in FY2025; new.
41	RWD Consulting LLC Top agencies DHA (Defense Health Agency)	$606,683	0.5%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2024 and not on the FY2025 list; new.
42	Chloeta Holdings LLC Top agencies HHS (Department of Health and Human Services)	$578,313	0.5%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2024 and not on the FY2025 list; new.
43	Synergy Staffing Inc. Top agencies Army (Department of the Army)	$566,749	0.5%	Rank history: #40 in FY2021, #21 in FY2022, #31 in FY2024 and not on the FY2025 list; down 22 since FY2022.
44	Magnificus Corporation Top agencies USAF (Department of the Air Force)	$542,027	0.5%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2024 and not on the FY2025 list; new.
45	Best Match Corporation Top agencies DHA (Defense Health Agency)	$538,820	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
46	Ut Medical Group, Inc. Top agencies VA (Department of Veterans Affairs)	$528,771	0.4%	Rank history: #32 in FY2021, #36 in FY2022, #72 in FY2024 and #39 in FY2025; down 10 since FY2022.
47	Planned Systems International Inc. Through Quarterline Consulting Services, LLC Top agencies USAF (Department of the Air Force)	$522,626	0.4%	Rank history: #61 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
48	Liveonny, Inc. Top agencies VA (Department of Veterans Affairs)	$510,000	0.4%	Rank history: not on the FY2021 list, #38 in FY2022 and not on the FY2024–FY2025 lists; down 10 since FY2022.
49	Decypher Technologies Ltd Top agencies Army (Department of the Army)	$504,526	0.4%	Rank history: #64 in FY2021, #61 in FY2022, #48 in FY2024 and #52 in FY2025; up 12 since FY2022.
50	Arkansas University Of Through University of Arkansas for Medical Sciences Top agencies VA (Department of Veterans Affairs)	$488,995	0.4%	Rank history: #37 in FY2021, #43 in FY2022, #36 in FY2024 and not on the FY2025 list; down 7 since FY2022.
51	Millbrook Support Services Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$452,781	0.4%	Rank history: not on the FY2021 list, #51 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
52	DAX Safety & Staffing Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$433,340	0.4%	Rank history: not on the FY2021–FY2022 lists, #16 in FY2024 and #31 in FY2025; new.
53	Risen Video Production, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$408,215	0.3%	Rank history: #93 in FY2021, #75 in FY2022, #25 in FY2024 and #25 in FY2025; up 22 since FY2022.
54	A2A Integrated Logistics Inc. Top agencies VA (Department of Veterans Affairs)	$404,362	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
55	Chan W Park LLC Top agencies DHA (Defense Health Agency)	$399,994	0.3%	Rank history: #43 in FY2021, #48 in FY2022, #56 in FY2024 and #62 in FY2025; down 7 since FY2022.
56	Kapi'olani Medical Specialists Top agencies DHA (Defense Health Agency)	$389,970	0.3%	Rank history: #59 in FY2021, #87 in FY2022, #58 in FY2024 and #69 in FY2025; up 31 since FY2022.
57	Hospital Hospitality House of Richmond, Inc. Top agencies VA (Department of Veterans Affairs)	$351,270	0.3%	Rank history: #71 in FY2021, #69 in FY2022, #65 in FY2024 and #57 in FY2025; up 12 since FY2022.
58	CLJ Consulting & Contracting LLC Top agencies Army (Department of the Army)	$344,920	0.3%	Rank history: #50 in FY2021, #53 in FY2022, #59 in FY2024 and #49 in FY2025; down 5 since FY2022.
59	C a N C Health System Incorporated Through Charleston Area Medical Center Inc. Top agencies VA (Department of Veterans Affairs)	$341,732	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
60	Provizor Federal Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$336,317	0.3%	Rank history: #38 in FY2021, #31 in FY2022, #77 in FY2024 and not on the FY2025 list; down 29 since FY2022.
61	RD Staffco Inc. Top agencies Army (Department of the Army)	$328,435	0.3%	Rank history: #53 in FY2021, #58 in FY2022, #60 in FY2024 and not on the FY2025 list; down 3 since FY2022.
62	Readiforce Government Solutions LLC Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$318,419	0.3%	Rank history: #60 in FY2021, #50 in FY2022, #69 in FY2024 and #46 in FY2025; down 12 since FY2022.
63	Maxim Healthcare Services, Inc. Top agencies VA (Department of Veterans Affairs)	$301,877	0.3%	Rank history: #58 in FY2021, #62 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
64	Children's National Medical Center Top agencies DHA (Defense Health Agency)	$274,996	0.2%	Rank history: #54 in FY2021, #33 in FY2022, #50 in FY2024 and #60 in FY2025; down 31 since FY2022.
65	United Network for Organ Sharing Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$272,976	0.2%	Rank history: #82 in FY2021, #73 in FY2022, #66 in FY2024 and #78 in FY2025; up 8 since FY2022.
66	HMH Hospitals Corporation Top agencies VA (Department of Veterans Affairs)	$265,420	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
67	Evoked Potential LLC Top agencies VA (Department of Veterans Affairs)	$262,182	0.2%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2024 and #48 in FY2025; new.
68	BJC Health System Through Barnes Jewish Hospital Top agencies VA (Department of Veterans Affairs)	$259,224	0.2%	Rank history: #76 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
69	University of Missouri System Top agencies VA (Department of Veterans Affairs)	$244,848	0.2%	Rank history: #62 in FY2021, #49 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
70	Platinum Business Corporation Top agencies DHA (Defense Health Agency)	$243,632	0.2%	Rank history: #48 in FY2021, #42 in FY2022 and not on the FY2024–FY2025 lists; down 28 since FY2022.
71	The University of Alabama System Through University of Alabama At Birmingham Top agencies VA (Department of Veterans Affairs)	$242,950	0.2%	Rank history: #77 in FY2021, #35 in FY2022 and not on the FY2024–FY2025 lists; down 36 since FY2022.
72	University of Kentucky Top agencies VA (Department of Veterans Affairs)	$239,000	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
73	Medtronic USA Inc. Top agencies VA (Department of Veterans Affairs)	$235,400	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
74	R. S. Means Company LLC Through Censis Technologies, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$222,763	0.2%	Rank history: #45 in FY2021, #78 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
75	University of South Florida Top agencies VA (Department of Veterans Affairs)	$221,093	0.2%	Rank history: #74 in FY2021, #77 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
76	Bay Area Anesthesia LLC Top agencies HHS (Department of Health and Human Services)	$219,365	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
77	Surgical Cell Services, P.L.C. Top agencies VA (Department of Veterans Affairs)	$210,412	0.2%	Rank history: #98 in FY2021, #76 in FY2022, not on the FY2024 list and #70 in FY2025; down 1 since FY2022.
78	Giamed Alliance JV LLC Top agencies DHA (Defense Health Agency)	$206,502	0.2%	Rank history: not on the FY2021 list, #63 in FY2022, #91 in FY2024 and #74 in FY2025; down 15 since FY2022.
79	Enterprise Resource Planning International, LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$205,403	0.2%	Rank history: #69 in FY2021, #59 in FY2022, #61 in FY2024 and #63 in FY2025; down 20 since FY2022.
80	Billings Clinic Top agencies HHS (Department of Health and Human Services)	$199,680	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
81	End Inc. Top agencies VA (Department of Veterans Affairs)	$193,500	0.2%	Rank history: #78 in FY2021, #91 in FY2022 and not on the FY2024–FY2025 lists; up 10 since FY2022.
82	Nuvasive, Inc. 2 awardees, including Nuvasive Clinical Services Monitoring, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$189,420	0.2%	Rank history: #66 in FY2021, #64 in FY2022, #63 in FY2024 and not on the FY2025 list; down 18 since FY2022.
83	Agiliti Health Inc. Top agencies VA (Department of Veterans Affairs)	$178,805	0.2%	Rank history: #55 in FY2021, not on the FY2022 list, not on the FY2024 list and #61 in FY2025; returned.
84	Lovell Government Services LLC Top agencies VA (Department of Veterans Affairs)	$157,871	0.1%	Rank history: not on the FY2021 list, #82 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
85	University Surgical Associates Inc Top agencies VA (Department of Veterans Affairs)	$154,112	0.1%	Rank history: not on the FY2021 list, #80 in FY2022, #80 in FY2024 and not on the FY2025 list; down 5 since FY2022.
86	Spectrum Services Group Inc. Top agencies USAF (Department of the Air Force)	$153,024	0.1%	Rank history: #79 in FY2021, #83 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
87	Yale New Haven Health Services Corporation Through Yale New Haven Hospital, Inc. Top agencies VA (Department of Veterans Affairs)	$133,870	0.1%	Rank history: #41 in FY2021, #40 in FY2022 and not on the FY2024–FY2025 lists; down 47 since FY2022.
88	Loyola University of Chicago Top agencies VA (Department of Veterans Affairs)	$123,552	0.1%	Rank history: not on the FY2021 list, #65 in FY2022 and not on the FY2024–FY2025 lists; down 23 since FY2022.
89	University of Rochester Top agencies VA (Department of Veterans Affairs)	$122,400	0.1%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2024 and not on the FY2025 list; new.
90	The Medical College of Wisconsin, Inc. Top agencies VA (Department of Veterans Affairs)	$111,465	0.1%	Rank history: #86 in FY2021, #74 in FY2022, #73 in FY2024 and #72 in FY2025; down 16 since FY2022.
91	Neurology Mobile System Associates Inc. Top agencies VA (Department of Veterans Affairs)	$110,205	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
92	Centralcare, Incorporated Top agencies USAF (Department of the Air Force)	$106,641	0.1%	Rank history: not on the FY2021 list, #94 in FY2022, #24 in FY2024 and not on the FY2025 list; up 2 since FY2022.
93	Yale Univ Top agencies VA (Department of Veterans Affairs)	$105,896	0.1%	Rank history: #72 in FY2021, not on the FY2022 list, #82 in FY2024 and #82 in FY2025; up 11 since FY2022.
94	Brown Medicine Top agencies VA (Department of Veterans Affairs)	$102,558	0.1%	Rank history: #67 in FY2021, #72 in FY2022 and not on the FY2024–FY2025 lists; down 22 since FY2022.
95	SA Solutions Inc. Top agencies Army (Department of the Army)	$91,157	0.1%	Rank history: #87 in FY2021, #98 in FY2022, #92 in FY2024 and not on the FY2025 list; up 3 since FY2022.
96	Perfusion.com, Inc. Top agencies VA (Department of Veterans Affairs)	$88,148	0.1%	Rank history: #92 in FY2021, #96 in FY2022, #95 in FY2024 and #88 in FY2025; unchanged since FY2022.
97	Dany Hanna DO, PLLC Top agencies DOJ (Department of Justice)	$84,078	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
98	Intranerve LLC Top agencies VA (Department of Veterans Affairs)	$82,025	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
99	Mitchell Consulting Services Group Inc Top agencies HHS (Department of Health and Human Services)	$72,438	0.1%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2024 and #75 in FY2025; new.
100	Cardio-Vascular Surgical Services, Inc. Top agencies DHA (Defense Health Agency)	$72,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.

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100 of 146 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 $119 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 PSC Q523 contractors in FY2023?

1. Medstar Health, Inc. ($7.65M), 2. Gift of Hope Organ & Tissue Donor Network ($7.09M), 3. Christus Santa Rosa Health Care Corporation ($6.81M), 4. Vanderbelt University Medical Center ($6.41M), 5. Neurosurgical Associates of Central New York, LLP ($3.72M), 6. Banner Phoenix Surgery Center, LLC ($3.71M), 7. Distinctive Health Spectrum Care JV LLC ($3.41M), 8. Brigham & Womens Hospital Inc. ($2.68M), 9. Oregon Health & Science University ($2.64M), 10. Medical Faculty Associates, Inc. ($2.55M).

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