Top 100 Contractors in NAICS 621910: Ambulance Services, FY2023

Name: Top 100 Contractors in NAICS 621910: Ambulance Services, FY2023
Creator: GovTribe

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

The top 10 won 26% of FY2023 NAICS 621910 contract dollars

Contract obligations: $233,720,988 Net of deobligations, by contracts coded NAICS 621910
Contractors: 245 Parent companies with an obligation
Largest contractor: Excelsior Ambulance Service Inc. $18.4 million, 4.9% 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	Excelsior Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$18,442,451	4.9%	Rank history: #5 in FY2021, #2 in FY2022, #2 in FY2024 and #2 in FY2025; up 1 since FY2022.
2	Reliance Medical Transport, LLC Top agencies VA (Department of Veterans Affairs)	$15,984,112	4.3%	Rank history: #15 in FY2021, #6 in FY2022, #3 in FY2024 and #3 in FY2025; up 4 since FY2022.
3	United Medevac Solutions, Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force) Army (Department of the Army)	$11,237,934	3.0%	Rank history: #2 in FY2021, #3 in FY2022, #5 in FY2024 and #15 in FY2025; unchanged since FY2022.
4	Acadian Ambulance Service Inc. 3 awardees, including Acadian Ambulance Service of Texas, LLC and Acadian Ambulance Service of Tennessee, LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$10,131,192	2.7%	Rank history: #4 in FY2021, #5 in FY2022, #4 in FY2024 and #14 in FY2025; up 1 since FY2022.
5	Medshore Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$8,749,333	2.3%	Rank history: #3 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
6	Western-Star Hospital Authority Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$8,221,871	2.2%	Rank history: #30 in FY2021, #19 in FY2022, not on the FY2024 list and #41 in FY2025; up 13 since FY2022.
7	Medex Medical Transport Service Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$8,002,902	2.1%	Rank history: #22 in FY2021, #7 in FY2022, #21 in FY2024 and #6 in FY2025; unchanged since FY2022.
8	Jan-Care Ambulance of North Central W.va., Inc. Top agencies VA (Department of Veterans Affairs)	$6,916,657	1.9%	Rank history: #6 in FY2021, #4 in FY2022, #6 in FY2024 and #5 in FY2025; down 4 since FY2022.
9	Ambulance Management Services Limited Top agencies VA (Department of Veterans Affairs)	$4,364,877	1.2%	Rank history: #19 in FY2021, #18 in FY2022, #14 in FY2024 and #19 in FY2025; up 9 since FY2022.
10	Rocky Mountain Holdings L.L.C 2 awardees, including Air Methods, LLC Top agencies DHA (Defense Health Agency)	$4,299,422	1.2%	Rank history: #8 in FY2021, #10 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
11	Mercy Air Service Inc Top agencies Navy (Department of the Navy) DOJ (Department of Justice)	$4,269,632	1.1%	Rank history: not on the FY2021 list, #9 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
12	American Medical Response of Tennessee Inc. Top agencies VA (Department of Veterans Affairs)	$3,821,507	1.0%	Rank history: #12 in FY2021, #16 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
13	HVM Associates LLC Top agencies VA (Department of Veterans Affairs)	$3,449,188	0.9%	Rank history: #42 in FY2021, #21 in FY2022, #63 in FY2024 and #56 in FY2025; up 8 since FY2022.
14	Journey Via Gurney, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$3,401,265	0.9%	Rank history: #13 in FY2021, #11 in FY2022, #10 in FY2024 and #13 in FY2025; down 3 since FY2022.
15	Legacy Ems Inc. Top agencies USAF (Department of the Air Force)	$3,389,412	0.9%	Rank history: #79 in FY2021, #36 in FY2022, #41 in FY2024 and #23 in FY2025; up 21 since FY2022.
16	Front Line Ems LLC Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$3,375,049	0.9%	Rank history: #18 in FY2021, #17 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
17	Washington County - Johnson City Emergency Medical Services, Inc. Top agencies VA (Department of Veterans Affairs)	$3,131,009	0.8%	Rank history: #32 in FY2021, #32 in FY2022, #69 in FY2024 and #63 in FY2025; up 15 since FY2022.
18	First Care Ohio LLC Top agencies VA (Department of Veterans Affairs)	$2,910,926	0.8%	Rank history: #25 in FY2021, #30 in FY2022, #7 in FY2024 and #9 in FY2025; up 12 since FY2022.
19	Jcsd Emergency Medical Group, Inc. Through Medicone Medical Response of Tennessee, Inc. Top agencies VA (Department of Veterans Affairs)	$2,884,411	0.8%	Rank history: #49 in FY2021, #20 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
20	Bradsher, James E Top agencies VA (Department of Veterans Affairs)	$2,839,847	0.8%	Rank history: #14 in FY2021, #13 in FY2022, #17 in FY2024 and #35 in FY2025; down 7 since FY2022.
21	Brewster Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$2,605,660	0.7%	Rank history: #7 in FY2021, #15 in FY2022, not on the FY2024 list and #83 in FY2025; down 6 since FY2022.
22	Ohio Ambulance Solutions, LLC Top agencies VA (Department of Veterans Affairs)	$2,399,805	0.6%	Rank history: not on the FY2021 list, #14 in FY2022, not on the FY2024 list and #18 in FY2025; down 8 since FY2022.
23	Emergycare Inc. Top agencies VA (Department of Veterans Affairs)	$2,381,726	0.6%	Rank history: #84 in FY2021, #27 in FY2022, #50 in FY2024 and #52 in FY2025; up 4 since FY2022.
24	Minuteman Ems LLC Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) Army (Department of the Army)	$2,350,961	0.6%	Rank history: not on the FY2021 list, #34 in FY2022, #31 in FY2024 and #50 in FY2025; up 10 since FY2022.
25	County of Cabell Through Cabell County Emergency Services Top agencies VA (Department of Veterans Affairs)	$2,317,450	0.6%	Rank history: #81 in FY2021, #83 in FY2022 and not on the FY2024–FY2025 lists; up 58 since FY2022.
26	County of Muskogee Through Muskogee County Ems Top agencies VA (Department of Veterans Affairs)	$2,281,178	0.6%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2024 and not on the FY2025 list; new.
27	Lifefleet Southeast Inc. Top agencies VA (Department of Veterans Affairs)	$2,067,017	0.6%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #59 in FY2025; new.
28	Navarre Corporation Top agencies VA (Department of Veterans Affairs)	$2,056,500	0.6%	Rank history: not on the FY2021 list, #26 in FY2022, #22 in FY2024 and #33 in FY2025; down 2 since FY2022.
29	Emergency Physicians Medical Group P.C. Through Professional Medical Transport, Inc. Top agencies VA (Department of Veterans Affairs)	$2,000,000	0.5%	Rank history: #68 in FY2021, #90 in FY2022, #38 in FY2024 and not on the FY2025 list; up 61 since FY2022.
30	Procare Ambulance of Maryland, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) USAF (Department of the Air Force)	$1,995,424	0.5%	Rank history: #28 in FY2021, #24 in FY2022, #30 in FY2024 and not on the FY2025 list; down 6 since FY2022.
31	Fireline Medics LLC 2 awardees Top agencies USDA (Department of Agriculture)	$1,921,073	0.5%	Rank history: #9 in FY2021, #52 in FY2022, #60 in FY2024 and not on the FY2025 list; up 21 since FY2022.
32	Mayo Clinic Through Mayo Clinic Ambulance Top agencies VA (Department of Veterans Affairs)	$1,849,782	0.5%	Rank history: #72 in FY2021, #23 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
33	Wilderness Medics, Inc. Top agencies USDA (Department of Agriculture)	$1,846,781	0.5%	Rank history: #24 in FY2021, #45 in FY2022, #27 in FY2024 and #46 in FY2025; up 12 since FY2022.
34	Lifeline Medical Services, Inc. Top agencies VA (Department of Veterans Affairs)	$1,844,465	0.5%	Rank history: #16 in FY2021, #8 in FY2022, #23 in FY2024 and #22 in FY2025; down 26 since FY2022.
35	Mercy Ambulance of Evansville, Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$1,718,666	0.5%	Rank history: #59 in FY2021, #70 in FY2022, not on the FY2024 list and #88 in FY2025; up 35 since FY2022.
36	Symons Emergency Specialties Inc Top agencies VA (Department of Veterans Affairs)	$1,657,059	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
37	Asteri Consulting Services LLC Top agencies USAF (Department of the Air Force)	$1,650,742	0.4%	Rank history: #39 in FY2021, #38 in FY2022, #89 in FY2024 and not on the FY2025 list; up 1 since FY2022.
38	K & W Medical Services, Inc. Top agencies VA (Department of Veterans Affairs)	$1,588,723	0.4%	Rank history: #60 in FY2021, #55 in FY2022, #51 in FY2024 and #57 in FY2025; up 17 since FY2022.
39	L-J-L Trucking, Inc. Top agencies VA (Department of Veterans Affairs)	$1,575,114	0.4%	Rank history: #51 in FY2021, #56 in FY2022, #54 in FY2024 and #82 in FY2025; up 17 since FY2022.
40	Crest Transportation Services Inc. Top agencies VA (Department of Veterans Affairs)	$1,573,644	0.4%	Rank history: #63 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
41	Paramedic Systems Inc Through Alert Ambulance Service, Inc. Top agencies VA (Department of Veterans Affairs)	$1,546,221	0.4%	Rank history: #27 in FY2021, #50 in FY2022 and not on the FY2024–FY2025 lists; up 9 since FY2022.
42	Pro Care Emergency Medical Services, LLC Top agencies VA (Department of Veterans Affairs)	$1,522,592	0.4%	Rank history: #45 in FY2021, not on the FY2022 list, #16 in FY2024 and #32 in FY2025; returned.
43	Firstmed Ambulance Services, Inc. Top agencies VA (Department of Veterans Affairs)	$1,498,978	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
44	CLV Enterprises, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$1,490,076	0.4%	Rank history: #23 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
45	Portsmouth Medic Transport LLC Top agencies VA (Department of Veterans Affairs)	$1,490,064	0.4%	Rank history: #34 in FY2021, #35 in FY2022, #52 in FY2024 and #76 in FY2025; down 10 since FY2022.
46	Emergency Response Logistics, LLC Top agencies USDA (Department of Agriculture)	$1,469,132	0.4%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2024 and #42 in FY2025; new.
47	Bay Area Anesthesia LLC Top agencies HHS (Department of Health and Human Services)	$1,468,498	0.4%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2024 and #25 in FY2025; new.
48	Jan-Care Ambulance Service Tri-State Division Inc. Top agencies VA (Department of Veterans Affairs)	$1,370,000	0.4%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2024 and not on the FY2025 list; new.
49	Citywide Mobile Response Corp Top agencies VA (Department of Veterans Affairs)	$1,281,496	0.3%	Rank history: #20 in FY2021, not on the FY2022 list, #20 in FY2024 and #30 in FY2025; returned.
50	Rico Aviation, LLC Top agencies VA (Department of Veterans Affairs)	$1,271,335	0.3%	Rank history: not on the FY2021 list, #31 in FY2022 and not on the FY2024–FY2025 lists; down 19 since FY2022.
51	Bay Medic Transportation Inc. Top agencies VA (Department of Veterans Affairs)	$1,259,348	0.3%	Rank history: #17 in FY2021, #60 in FY2022, #47 in FY2024 and #28 in FY2025; up 9 since FY2022.
52	Adventure Medics LLC Top agencies USDA (Department of Agriculture)	$1,258,252	0.3%	Rank history: #29 in FY2021, #81 in FY2022, #28 in FY2024 and #31 in FY2025; up 29 since FY2022.
53	Priority One Medical Transport Inc. Top agencies VA (Department of Veterans Affairs)	$1,241,593	0.3%	Rank history: #35 in FY2021, #40 in FY2022, #25 in FY2024 and #36 in FY2025; down 13 since FY2022.
54	Bay Cities Ambulance Top agencies VA (Department of Veterans Affairs)	$1,200,000	0.3%	Rank history: #40 in FY2021, #42 in FY2022, #75 in FY2024 and not on the FY2025 list; down 12 since FY2022.
55	Inflight Medical Services International, Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$1,167,379	0.3%	Rank history: #52 in FY2021, #39 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
56	Medex Transportation Services, Inc. Top agencies VA (Department of Veterans Affairs)	$1,161,177	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
57	Northeast Mobile Health Services Top agencies VA (Department of Veterans Affairs)	$1,157,410	0.3%	Rank history: #44 in FY2021, #49 in FY2022, #42 in FY2024 and not on the FY2025 list; down 8 since FY2022.
58	Mountain Medics Inc. Top agencies USDA (Department of Agriculture)	$1,120,375	0.3%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2024 and #74 in FY2025; new.
59	Able Ambulance, Inc. Top agencies VA (Department of Veterans Affairs)	$1,118,852	0.3%	Rank history: #26 in FY2021, #44 in FY2022 and not on the FY2024–FY2025 lists; down 15 since FY2022.
60	North Memorial Health Care Top agencies VA (Department of Veterans Affairs)	$1,101,516	0.3%	Rank history: #82 in FY2021, #68 in FY2022, #68 in FY2024 and not on the FY2025 list; up 8 since FY2022.
61	Best Practice Medicine LLC Top agencies USDA (Department of Agriculture)	$1,101,335	0.3%	Rank history: #74 in FY2021, not on the FY2022 list, #46 in FY2024 and #53 in FY2025; up 41 since FY2022.
62	Premier Medical Transportation, Inc. Top agencies VA (Department of Veterans Affairs)	$1,100,000	0.3%	Rank history: not on the FY2021–FY2022 lists, #32 in FY2024 and #70 in FY2025; new.
63	Lifecare of Alabama Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$1,093,809	0.3%	Rank history: #11 in FY2021, #12 in FY2022 and not on the FY2024–FY2025 lists; down 51 since FY2022.
64	Campbell County Hospital District Top agencies VA (Department of Veterans Affairs)	$1,086,106	0.3%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2024 and #97 in FY2025; new.
65	Triple Canopy Inc. Through Centerra Group, LLC Top agencies DOS (Department of State)	$1,013,785	0.3%	Rank history: #33 in FY2021, #25 in FY2022 and not on the FY2024–FY2025 lists; down 40 since FY2022.
66	Richmond County Ambulance Service, Inc. Top agencies VA (Department of Veterans Affairs)	$1,012,591	0.3%	Rank history: #48 in FY2021, #76 in FY2022 and not on the FY2024–FY2025 lists; up 10 since FY2022.
67	American Medical Response West Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$1,003,959	0.3%	Rank history: #93 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 104 since FY2022.
68	Medstar, Inc. Top agencies VA (Department of Veterans Affairs)	$999,993	0.3%	Rank history: #69 in FY2021, #69 in FY2022, #100 in FY2024 and #95 in FY2025; up 1 since FY2022.
69	Integrity Care Ems Inc. Top agencies VA (Department of Veterans Affairs)	$973,623	0.3%	Rank history: #98 in FY2021, #84 in FY2022, #73 in FY2024 and not on the FY2025 list; up 15 since FY2022.
70	Lifestar Response Corporation 2 awardees, including RG Ambulance Service, Inc. and Falck Mobile Health Corp Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$956,732	0.3%	Rank history: #65 in FY2021, #74 in FY2022, #65 in FY2024 and #60 in FY2025; up 4 since FY2022.
71	American Medical Response Ambulance Service, Inc. Top agencies VA (Department of Veterans Affairs)	$926,380	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #54 in FY2025; new.
72	Med-Care Transportation LLC Top agencies VA (Department of Veterans Affairs)	$889,581	0.2%	Rank history: #91 in FY2021, #67 in FY2022, #37 in FY2024 and not on the FY2025 list; down 5 since FY2022.
73	Portsmouth Emergency Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$877,765	0.2%	Rank history: #61 in FY2021, #85 in FY2022, not on the FY2024 list and #55 in FY2025; up 12 since FY2022.
74	Sacred Mountain Medical Service, Inc. Top agencies HHS (Department of Health and Human Services)	$848,000	0.2%	Rank history: not on the FY2021 list, #57 in FY2022, #74 in FY2024 and not on the FY2025 list; down 17 since FY2022.
75	Trans-Med Ambulance Inc. Top agencies VA (Department of Veterans Affairs)	$845,520	0.2%	Rank history: #53 in FY2021, #63 in FY2022, #71 in FY2024 and #92 in FY2025; down 12 since FY2022.
76	Bernalillo County Health Care Corp Top agencies USAF (Department of the Air Force)	$833,104	0.2%	Rank history: #62 in FY2021, #58 in FY2022, #85 in FY2024 and #87 in FY2025; down 18 since FY2022.
77	Medstar Ambulance, Inc. Top agencies USAF (Department of the Air Force)	$781,500	0.2%	Rank history: #58 in FY2021, #47 in FY2022, #88 in FY2024 and #91 in FY2025; down 30 since FY2022.
78	D.p. Murphy Ambulance Company Top agencies VA (Department of Veterans Affairs)	$773,053	0.2%	Rank history: #76 in FY2021, #59 in FY2022, #55 in FY2024 and not on the FY2025 list; down 19 since FY2022.
79	C.h.l. Ems, Inc. Top agencies USDA (Department of Agriculture)	$764,980	0.2%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2024 and #40 in FY2025; new.
80	Vmsc Emergency Medical Services Top agencies Army (Department of the Army)	$744,600	0.2%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2024 and #93 in FY2025; new.
81	Caribe Medical Supply Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) DODEA (Department of Defense Education Activity)	$739,049	0.2%	Rank history: #46 in FY2021, #54 in FY2022, #64 in FY2024 and #80 in FY2025; down 27 since FY2022.
82	Action Care Ambulance, Inc. Top agencies VA (Department of Veterans Affairs)	$724,464	0.2%	Rank history: #55 in FY2021, #88 in FY2022 and not on the FY2024–FY2025 lists; up 6 since FY2022.
83	Metro West Ambulance Service, Inc. Top agencies VA (Department of Veterans Affairs)	$690,688	0.2%	Rank history: not on the FY2021 list, #62 in FY2022, #43 in FY2024 and #43 in FY2025; down 21 since FY2022.
84	International SOS Government Services Inc. Top agencies Navy (Department of the Navy) DOE (Department of Energy) DHS (Department of Homeland Security)	$634,077	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 65 since FY2022.
85	Rough Country Response LLC Top agencies USDA (Department of Agriculture)	$632,714	0.2%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2024 and #86 in FY2025; new.
86	AC Global Air Ambulance, LLC Top agencies VA (Department of Veterans Affairs)	$628,014	0.2%	Rank history: #89 in FY2021, #71 in FY2022 and not on the FY2024–FY2025 lists; down 15 since FY2022.
87	Advanced Air Ambulance, Corp. Top agencies DOJ (Department of Justice) HHS (Department of Health and Human Services)	$626,329	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 35 since FY2022.
88	Butler County Ems LLC Top agencies VA (Department of Veterans Affairs)	$614,897	0.2%	Rank history: #64 in FY2021, #65 in FY2022, #82 in FY2024 and #68 in FY2025; down 23 since FY2022.
89	Med Transport Inc. Top agencies USDA (Department of Agriculture)	$603,069	0.2%	Rank history: #85 in FY2021, #64 in FY2022, #99 in FY2024 and #98 in FY2025; down 25 since FY2022.
90	Huron Valley Ambulance Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$598,563	0.2%	Rank history: #57 in FY2021, #48 in FY2022, not on the FY2024 list and #61 in FY2025; down 42 since FY2022.
91	Mobile Medical Response, Inc. Top agencies VA (Department of Veterans Affairs)	$592,200	0.2%	Rank history: #90 in FY2021, #87 in FY2022, #98 in FY2024 and not on the FY2025 list; down 4 since FY2022.
92	Professional Healthcare Associates Inc. Top agencies VA (Department of Veterans Affairs)	$560,420	0.1%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2024 and not on the FY2025 list; new.
93	Mid Atlantic Care LLC Top agencies VA (Department of Veterans Affairs)	$538,105	0.1%	Rank history: #96 in FY2021, #73 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
94	Action Ambulance Service Inc. Top agencies USAF (Department of the Air Force)	$535,500	0.1%	Rank history: #83 in FY2021, #77 in FY2022 and not on the FY2024–FY2025 lists; down 17 since FY2022.
95	K.w.p.h. Enterprises Top agencies VA (Department of Veterans Affairs)	$530,985	0.1%	Rank history: #56 in FY2021, #80 in FY2022 and not on the FY2024–FY2025 lists; down 15 since FY2022.
96	Injury Care Emergency Medical Services PC Top agencies USDA (Department of Agriculture)	$512,064	0.1%	Rank history: not on the FY2021 list, #89 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
97	Techs Inc. Top agencies VA (Department of Veterans Affairs)	$504,875	0.1%	Rank history: #54 in FY2021, #72 in FY2022 and not on the FY2024–FY2025 lists; down 25 since FY2022.
98	American Correctional Healthcare, Inc. Top agencies DOJ (Department of Justice)	$497,085	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
99	Cascade Medical Transport of Oregon, LLC Top agencies USDA (Department of Agriculture)	$464,444	0.1%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2024 and not on the FY2025 list; up 58 since FY2022.
100	Haynes Ambulance of Alabama Inc. Top agencies USAF (Department of the Air Force)	$461,638	0.1%	Rank history: #47 in FY2021, #46 in FY2022 and not on the FY2024–FY2025 lists; down 54 since FY2022.

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100 of 245 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 $374 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 621910 contractors in FY2023?

1. Excelsior Ambulance Service Inc. ($18.4M), 2. Reliance Medical Transport, LLC ($16M), 3. United Medevac Solutions, Inc. ($11.2M), 4. Acadian Ambulance Service Inc. ($10.1M), 5. Medshore Ambulance Service Inc. ($8.75M), 6. Western-Star Hospital Authority Inc. ($8.22M), 7. Medex Medical Transport Service Inc. ($8M), 8. Jan-Care Ambulance of North Central W.va., Inc. ($6.92M), 9. Ambulance Management Services Limited ($4.36M), 10. Rocky Mountain Holdings L.L.C ($4.3M).

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