Top 100 Contractors in NAICS 621910: Ambulance Services, FY2021

Name: Top 100 Contractors in NAICS 621910: Ambulance Services, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 62% of FY2021 NAICS 621910 contract dollars

Contract obligations: $552,801,023 Net of deobligations, by contracts coded NAICS 621910
Contractors: 209 Parent companies with an obligation
Largest contractor: American Medical Response Inc. $378 million, 53.6% 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	American Medical Response Inc. 27 awardees, including Life Line Ambulance Service, Inc., American Medical Response West and Abbott Ambulance, Inc. Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$377,756,440	53.6%	Rank history: #1 in FY2022, not on the FY2023 list, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	United Medevac Solutions, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$10,356,828	1.5%	Rank history: #3 in FY2022, #3 in FY2023, #5 in FY2024 and #15 in FY2025; up 2 since FY2020.
3	Medshore Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$9,299,000	1.3%	Rank history: not on the FY2022 list, #5 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
4	Acadian Ambulance Service Inc. 3 awardees, including Acadian Ambulance Service of Tennessee, LLC and Acadian Ambulance Service of Texas, LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$7,309,956	1.0%	Rank history: #5 in FY2022, #4 in FY2023, #4 in FY2024 and #14 in FY2025; up 4 since FY2020.
5	Excelsior Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$7,146,319	1.0%	Rank history: #2 in FY2022, #1 in FY2023, #2 in FY2024 and #2 in FY2025; up 5 since FY2020.
6	Jan-Care Ambulance of North Central W.va., Inc. Top agencies VA (Department of Veterans Affairs)	$6,765,083	1.0%	Rank history: #4 in FY2022, #8 in FY2023, #6 in FY2024 and #5 in FY2025; up 1 since FY2020.
7	Brewster Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$6,185,143	0.9%	Rank history: #15 in FY2022, #21 in FY2023, not on the FY2024 list and #83 in FY2025; up 9 since FY2020.
8	Rocky Mountain Holdings L.L.C 2 awardees, including Air Methods, LLC Top agencies Army (Department of the Army) DOJ (Department of Justice)	$4,702,252	0.7%	Rank history: #10 in FY2022, #10 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
9	Fireline Medics LLC Top agencies USDA (Department of Agriculture)	$4,390,699	0.6%	Rank history: #52 in FY2022, #31 in FY2023, #60 in FY2024 and not on the FY2025 list; up 26 since FY2020.
10	Mercy Air Service Inc. Top agencies Navy (Department of the Navy)	$4,320,713	0.6%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
11	Lifecare of Alabama Inc. Top agencies VA (Department of Veterans Affairs)	$4,272,435	0.6%	Rank history: #12 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
12	American Medical Response of Tennessee Inc. Top agencies VA (Department of Veterans Affairs)	$3,960,031	0.6%	Rank history: #16 in FY2022, #12 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
13	Journey Via Gurney, LLC Top agencies VA (Department of Veterans Affairs)	$3,533,885	0.5%	Rank history: #11 in FY2022, #14 in FY2023, #10 in FY2024 and #13 in FY2025; down 1 since FY2020.
14	Bradsher, James E Top agencies VA (Department of Veterans Affairs)	$3,281,013	0.5%	Rank history: #13 in FY2022, #20 in FY2023, #17 in FY2024 and #35 in FY2025; new, not ranked in FY2020.
15	Reliance Medical Transport, LLC Top agencies VA (Department of Veterans Affairs)	$3,239,793	0.5%	Rank history: #6 in FY2022, #2 in FY2023, #3 in FY2024 and #3 in FY2025; unchanged since FY2020.
16	Lifeline Medical Services, Inc. Top agencies VA (Department of Veterans Affairs)	$3,024,042	0.4%	Rank history: #8 in FY2022, #34 in FY2023, #23 in FY2024 and #22 in FY2025; up 2 since FY2020.
17	Bay Medic Transportation Inc. Top agencies VA (Department of Veterans Affairs)	$2,534,241	0.4%	Rank history: #60 in FY2022, #51 in FY2023, #47 in FY2024 and #28 in FY2025; up 29 since FY2020.
18	Front Line Ems LLC Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$2,417,688	0.3%	Rank history: #17 in FY2022, #16 in FY2023 and not on the FY2024–FY2025 lists; up 6 since FY2020.
19	Ambulance Management Services Limited Top agencies VA (Department of Veterans Affairs)	$2,300,903	0.3%	Rank history: #18 in FY2022, #9 in FY2023, #14 in FY2024 and #19 in FY2025; up 3 since FY2020.
20	Citywide Mobile Response Corp Top agencies VA (Department of Veterans Affairs)	$2,256,905	0.3%	Rank history: not on the FY2022 list, #49 in FY2023, #20 in FY2024 and #30 in FY2025; up 1 since FY2020.
21	Professional Staffing Associates LLC Top agencies VA (Department of Veterans Affairs)	$2,244,584	0.3%	Rank history: not on the FY2022–FY2025 lists; down 16 since FY2020.
22	Medex Medical Transport Service Inc. Top agencies VA (Department of Veterans Affairs)	$2,163,416	0.3%	Rank history: #7 in FY2022, #7 in FY2023, #21 in FY2024 and #6 in FY2025; up 53 since FY2020.
23	CLV Enterprises, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$2,161,604	0.3%	Rank history: #43 in FY2022, #44 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
24	Wilderness Medics, Inc. Top agencies USDA (Department of Agriculture)	$2,025,597	0.3%	Rank history: #45 in FY2022, #33 in FY2023, #27 in FY2024 and #46 in FY2025; up 14 since FY2020.
25	First Care Ohio LLC Top agencies VA (Department of Veterans Affairs)	$1,907,181	0.3%	Rank history: #30 in FY2022, #18 in FY2023, #7 in FY2024 and #9 in FY2025; up 8 since FY2020.
26	Able Ambulance, Inc. Top agencies VA (Department of Veterans Affairs)	$1,863,017	0.3%	Rank history: #44 in FY2022, #59 in FY2023 and not on the FY2024–FY2025 lists; up 44 since FY2020.
27	Paramedic Systems Inc Through Alert Ambulance Service, Inc. Top agencies VA (Department of Veterans Affairs)	$1,828,586	0.3%	Rank history: #50 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 41 since FY2020.
28	Procare Ambulance of Maryland, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$1,827,842	0.3%	Rank history: #24 in FY2022, #30 in FY2023, #30 in FY2024 and not on the FY2025 list; up 2 since FY2020.
29	Adventure Medics LLC Top agencies USDA (Department of Agriculture)	$1,757,140	0.2%	Rank history: #81 in FY2022, #52 in FY2023, #28 in FY2024 and #31 in FY2025; up 108 since FY2020.
30	Western-Star Hospital Authority Inc. Top agencies VA (Department of Veterans Affairs)	$1,706,846	0.2%	Rank history: #19 in FY2022, #6 in FY2023, not on the FY2024 list and #41 in FY2025; up 63 since FY2020.
31	Careflight Limited Top agencies Navy (Department of the Navy)	$1,693,809	0.2%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; up 70 since FY2020.
32	Washington County - Johnson City Emergency Medical Services, Inc. Top agencies VA (Department of Veterans Affairs)	$1,680,206	0.2%	Rank history: #32 in FY2022, #17 in FY2023, #69 in FY2024 and #63 in FY2025; down 5 since FY2020.
33	Triple Canopy Inc. Through Centerra Group, LLC Top agencies DOS (Department of State)	$1,617,357	0.2%	Rank history: #25 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
34	Portsmouth Medic Transport LLC Top agencies VA (Department of Veterans Affairs)	$1,570,673	0.2%	Rank history: #35 in FY2022, #45 in FY2023, #52 in FY2024 and #76 in FY2025; down 2 since FY2020.
35	Priority One Medical Transport Inc. Top agencies VA (Department of Veterans Affairs)	$1,564,719	0.2%	Rank history: #40 in FY2022, #53 in FY2023, #25 in FY2024 and #36 in FY2025; down 10 since FY2020.
36	Blackhawk Medical Transportation Inc. Top agencies VA (Department of Veterans Affairs)	$1,558,061	0.2%	Rank history: #37 in FY2022 and not on the FY2023–FY2025 lists; up 49 since FY2020.
37	Ready 2 Go Transport Central LLC Top agencies VA (Department of Veterans Affairs)	$1,454,524	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
38	Coordinated Transportation Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$1,388,394	0.2%	Rank history: #28 in FY2022, not on the FY2023 list, #40 in FY2024 and #77 in FY2025; up 62 since FY2020.
39	Asteri Consulting Services LLC Top agencies USAF (Department of the Air Force)	$1,366,420	0.2%	Rank history: #38 in FY2022, #37 in FY2023, #89 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
40	Bay Cities Ambulance Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$1,352,428	0.2%	Rank history: #42 in FY2022, #54 in FY2023, #75 in FY2024 and not on the FY2025 list; up 43 since FY2020.
41	Connectinc Global Management LLC Top agencies VA (Department of Veterans Affairs)	$1,287,607	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	HVM Associates LLC Top agencies VA (Department of Veterans Affairs)	$1,254,750	0.2%	Rank history: #21 in FY2022, #13 in FY2023, #63 in FY2024 and #56 in FY2025; new, not ranked in FY2020.
43	Liberty Ambulance LLC Top agencies VA (Department of Veterans Affairs)	$1,239,869	0.2%	Rank history: #41 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
44	Northeast Mobile Health Services Top agencies VA (Department of Veterans Affairs)	$1,174,518	0.2%	Rank history: #49 in FY2022, #57 in FY2023, #42 in FY2024 and not on the FY2025 list; up 6 since FY2020.
45	Pro Care Emergency Medical Services, LLC Top agencies VA (Department of Veterans Affairs)	$1,083,987	0.2%	Rank history: not on the FY2022 list, #42 in FY2023, #16 in FY2024 and #32 in FY2025; up 12 since FY2020.
46	Caribe Medical Supply Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) DODEA (Department of Defense Education Activity)	$1,064,986	0.2%	Rank history: #54 in FY2022, #81 in FY2023, #64 in FY2024 and #80 in FY2025; down 7 since FY2020.
47	Haynes Ambulance of Alabama Inc. Top agencies USAF (Department of the Air Force)	$1,044,909	0.1%	Rank history: #46 in FY2022, #100 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
48	Richmond County Ambulance Service, Inc. Top agencies VA (Department of Veterans Affairs)	$1,004,642	0.1%	Rank history: #76 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
49	Jcsd Emergency Medical Group, Inc. Through Medicone Medical Response of Tennessee, Inc. Top agencies VA (Department of Veterans Affairs)	$965,640	0.1%	Rank history: #20 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
50	Metropolitan Area Ems Authority Top agencies DOJ (Department of Justice)	$951,712	0.1%	Rank history: not on the FY2022–FY2025 lists; down 13 since FY2020.
51	L-J-L Trucking, Inc. Top agencies VA (Department of Veterans Affairs)	$877,517	0.1%	Rank history: #56 in FY2022, #39 in FY2023, #54 in FY2024 and #82 in FY2025; down 3 since FY2020.
52	Inflight Medical Services International, Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$833,720	0.1%	Rank history: #39 in FY2022, #55 in FY2023 and not on the FY2024–FY2025 lists; up 17 since FY2020.
53	Trans-Med Ambulance Inc. Top agencies VA (Department of Veterans Affairs)	$829,346	0.1%	Rank history: #63 in FY2022, #75 in FY2023, #71 in FY2024 and #92 in FY2025; up 3 since FY2020.
54	Techs Inc. Top agencies VA (Department of Veterans Affairs)	$819,694	0.1%	Rank history: #72 in FY2022, #97 in FY2023 and not on the FY2024–FY2025 lists; down 35 since FY2020.
55	Action Care Ambulance, Inc. Top agencies VA (Department of Veterans Affairs)	$798,900	0.1%	Rank history: #88 in FY2022, #82 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2020.
56	K.w.p.h. Enterprises Top agencies VA (Department of Veterans Affairs)	$793,637	0.1%	Rank history: #80 in FY2022, #95 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
57	Huron Valley Ambulance Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$789,973	0.1%	Rank history: #48 in FY2022, #90 in FY2023, not on the FY2024 list and #61 in FY2025; up 53 since FY2020.
58	Medstar Ambulance, Inc. Top agencies USAF (Department of the Air Force)	$781,500	0.1%	Rank history: #47 in FY2022, #77 in FY2023, #88 in FY2024 and #91 in FY2025; up 4 since FY2020.
59	Mercy Ambulance of Evansville, Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$780,578	0.1%	Rank history: #70 in FY2022, #35 in FY2023, not on the FY2024 list and #88 in FY2025; up 30 since FY2020.
60	K & W Medical Services, Inc. Top agencies VA (Department of Veterans Affairs)	$765,985	0.1%	Rank history: #55 in FY2022, #38 in FY2023, #51 in FY2024 and #57 in FY2025; up 4 since FY2020.
61	Portsmouth Emergency Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$764,893	0.1%	Rank history: #85 in FY2022, #73 in FY2023, not on the FY2024 list and #55 in FY2025; up 12 since FY2020.
62	Bernalillo County Health Care Corp Top agencies USAF (Department of the Air Force)	$756,416	0.1%	Rank history: #58 in FY2022, #76 in FY2023, #85 in FY2024 and #87 in FY2025; up 5 since FY2020.
63	Crest Transportation Services Inc. Top agencies VA (Department of Veterans Affairs)	$750,000	0.1%	Rank history: #33 in FY2022, #40 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
64	Butler County Ems LLC Top agencies VA (Department of Veterans Affairs)	$749,169	0.1%	Rank history: #65 in FY2022, #88 in FY2023, #82 in FY2024 and #68 in FY2025; up 7 since FY2020.
65	Lifestar Response Corporation 2 awardees, including RG Ambulance Service, Inc. Top agencies VA (Department of Veterans Affairs)	$737,583	0.1%	Rank history: #74 in FY2022, #70 in FY2023, #65 in FY2024 and #60 in FY2025; up 21 since FY2020.
66	Nucare Carolina Ambulance, Inc. Top agencies VA (Department of Veterans Affairs)	$712,259	0.1%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
67	American Transmed Inc. Top agencies VA (Department of Veterans Affairs)	$651,562	0.1%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
68	Emergency Physicians Medical Group P.C. Through Professional Medical Transport, Inc. Top agencies VA (Department of Veterans Affairs)	$651,162	0.1%	Rank history: #90 in FY2022, #29 in FY2023, #38 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
69	Medstar, Inc. Top agencies VA (Department of Veterans Affairs)	$636,216	0.1%	Rank history: #69 in FY2022, #68 in FY2023, #100 in FY2024 and #95 in FY2025; down 25 since FY2020.
70	Arthur Lee Willis JR Enterprises LLC Top agencies VA (Department of Veterans Affairs)	$621,500	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Logistical Customer Service, Inc. Top agencies Army (Department of the Army)	$603,641	0.1%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
72	Mayo Clinic Through Mayo Clinic Ambulance Top agencies VA (Department of Veterans Affairs)	$598,486	0.1%	Rank history: #23 in FY2022, #32 in FY2023 and not on the FY2024–FY2025 lists; down 31 since FY2020.
73	Curtis-Universal, Inc. Top agencies VA (Department of Veterans Affairs)	$581,571	0.1%	Rank history: not on the FY2022–FY2025 lists; up 84 since FY2020.
74	Best Practice Medicine LLC Top agencies USDA (Department of Agriculture)	$580,328	0.1%	Rank history: not on the FY2022 list, #61 in FY2023, #46 in FY2024 and #53 in FY2025; up 121 since FY2020.
75	Air Ems Inc. Top agencies VA (Department of Veterans Affairs)	$570,906	0.1%	Rank history: not on the FY2022–FY2023 lists, #67 in FY2024 and #62 in FY2025; up 4 since FY2020.
76	D.p. Murphy Ambulance Company Top agencies VA (Department of Veterans Affairs)	$567,780	0.1%	Rank history: #59 in FY2022, #78 in FY2023, #55 in FY2024 and not on the FY2025 list; up 73 since FY2020.
77	Eagle Ambulance Service Top agencies VA (Department of Veterans Affairs)	$549,975	0.1%	Rank history: not on the FY2022–FY2025 lists; up 46 since FY2020.
78	Rocky Mountain Ambulance, L.L.C. Top agencies VA (Department of Veterans Affairs)	$538,345	0.1%	Rank history: #75 in FY2022 and not on the FY2023–FY2025 lists; up 61 since FY2020.
79	Legacy Ems Inc. Top agencies USAF (Department of the Air Force) DOJ (Department of Justice)	$531,684	0.1%	Rank history: #36 in FY2022, #15 in FY2023, #41 in FY2024 and #23 in FY2025; up 29 since FY2020.
80	Chloeta Holdings LLC Top agencies USDA (Department of Agriculture)	$528,166	0.1%	Rank history: not on the FY2022–FY2025 lists; up 40 since FY2020.
81	County of Cabell Through Cabell County Emergency Services Top agencies VA (Department of Veterans Affairs)	$526,047	0.1%	Rank history: #83 in FY2022, #25 in FY2023 and not on the FY2024–FY2025 lists; up 69 since FY2020.
82	North Memorial Health Care 2 awardees Top agencies VA (Department of Veterans Affairs)	$526,001	0.1%	Rank history: #68 in FY2022, #60 in FY2023, #68 in FY2024 and not on the FY2025 list; up 30 since FY2020.
83	Action Ambulance Service Inc. Top agencies USAF (Department of the Air Force)	$525,000	0.1%	Rank history: #77 in FY2022, #94 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
84	Emergycare Inc. Top agencies VA (Department of Veterans Affairs)	$523,248	0.1%	Rank history: #27 in FY2022, #23 in FY2023, #50 in FY2024 and #52 in FY2025; down 71 since FY2020.
85	Med Transport Inc. Top agencies USDA (Department of Agriculture)	$512,588	0.1%	Rank history: #64 in FY2022, #89 in FY2023, #99 in FY2024 and #98 in FY2025; up 32 since FY2020.
86	Superior Ambulance Service, Inc. Top agencies VA (Department of Veterans Affairs)	$512,034	0.1%	Rank history: not on the FY2022–FY2024 lists and #96 in FY2025; down 8 since FY2020.
87	Lifeguard Ambulance Service LLC Top agencies VA (Department of Veterans Affairs)	$510,128	0.1%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; down 21 since FY2020.
88	Buncombe County Rescue Squad, Inc. Top agencies VA (Department of Veterans Affairs)	$483,485	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	AC Global Air Ambulance, LLC Top agencies VA (Department of Veterans Affairs)	$474,904	0.1%	Rank history: #71 in FY2022, #86 in FY2023 and not on the FY2024–FY2025 lists; down 38 since FY2020.
90	Mobile Medical Response, Inc. Top agencies VA (Department of Veterans Affairs)	$474,117	0.1%	Rank history: #87 in FY2022, #91 in FY2023, #98 in FY2024 and not on the FY2025 list; up 2 since FY2020.
91	Med-Care Transportation LLC Top agencies VA (Department of Veterans Affairs)	$450,003	0.1%	Rank history: #67 in FY2022, #72 in FY2023, #37 in FY2024 and not on the FY2025 list; down 14 since FY2020.
92	Regional Services, Ltd. Top agencies VA (Department of Veterans Affairs)	$436,879	0.1%	Rank history: not on the FY2022–FY2025 lists; down 75 since FY2020.
93	American Medical Response West Top agencies VA (Department of Veterans Affairs)	$433,044	0.1%	Rank history: not on the FY2022 list, #67 in FY2023 and not on the FY2024–FY2025 lists; down 40 since FY2020.
94	Zeena Ventures LLC Top agencies VA (Department of Veterans Affairs)	$418,592	0.1%	Rank history: not on the FY2022–FY2025 lists; down 49 since FY2020.
95	The Eagle Group Systems Inc Through Lifeline Ambulance, Inc. Top agencies USDA (Department of Agriculture)	$407,666	0.1%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
96	Mid Atlantic Care LLC Top agencies VA (Department of Veterans Affairs)	$400,206	0.1%	Rank history: #73 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; down 22 since FY2020.
97	Lifecare Ambulance Top agencies VA (Department of Veterans Affairs)	$398,703	0.1%	Rank history: not on the FY2022–FY2025 lists; up 5 since FY2020.
98	Integrity Care Ems Inc. Top agencies VA (Department of Veterans Affairs)	$358,820	0.1%	Rank history: #84 in FY2022, #69 in FY2023, #73 in FY2024 and not on the FY2025 list; down 49 since FY2020.
99	Proelite International Trading WLL Top agencies Navy (Department of the Navy)	$352,128	<0.1%	Rank history: #92 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
100	Hart To Heart Ambulance Service, Inc. Top agencies VA (Department of Veterans Affairs)	$350,081	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 10 since FY2020.

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100 of 209 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 $705 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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 FY2021?

1. American Medical Response Inc. ($378M), 2. United Medevac Solutions, Inc. ($10.4M), 3. Medshore Ambulance Service Inc. ($9.3M), 4. Acadian Ambulance Service Inc. ($7.31M), 5. Excelsior Ambulance Service Inc. ($7.15M), 6. Jan-Care Ambulance of North Central W.va., Inc. ($6.77M), 7. Brewster Ambulance Service Inc. ($6.19M), 8. Rocky Mountain Holdings L.L.C ($4.7M), 9. Fireline Medics LLC ($4.39M), 10. Mercy Air Service Inc. ($4.32M).

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