Top 100 Contractors in NAICS 6219: Other Ambulatory Health Care Services, FY2021

Name: Top 100 Contractors in NAICS 6219: Other Ambulatory Health Care Services, FY2021
Creator: GovTribe

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

The top 10 won 50% of FY2021 NAICS 6219 contract dollars

Contract obligations: $1,065,438,290 Net of deobligations, by contracts coded NAICS 6219 or a code under it
Contractors: 486 Parent companies with an obligation
Largest contractor: American Medical Response Inc. $387 million, 30.4% 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	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)	$386,533,751	30.4%	Rank history: #2 in FY2022, not on the FY2023 list, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	STG International, Inc. Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$114,516,008	9.0%	Rank history: #5 in FY2022, #1 in FY2023, #2 in FY2024 and #11 in FY2025; unchanged since FY2020.
3	National Marrow Donor Program Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$30,163,512	2.4%	Rank history: #53 in FY2022, #79 in FY2023, not on the FY2024 list and #95 in FY2025; unchanged since FY2020.
4	The American National Red Cross 2 awardees Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$22,273,181	1.8%	Rank history: #8 in FY2022, #6 in FY2023, #5 in FY2024 and #7 in FY2025; up 1 since FY2020.
5	Marshfield Clinic Health System, Inc. Top agencies HHS (Department of Health and Human Services)	$19,981,956	1.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
6	CHS Middle East LLC Through Acuity-Chs, LLC Top agencies DHS (Department of Homeland Security)	$19,956,103	1.6%	Rank history: #12 in FY2022, #14 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
7	Team Health Inc. Through Spectrum Healthcare Resources, Inc. Top agencies HHS (Department of Health and Human Services)	$14,103,441	1.1%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
8	United Medevac Solutions, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$10,356,828	0.8%	Rank history: #14 in FY2022, #16 in FY2023, #18 in FY2024 and #37 in FY2025; up 1 since FY2020.
9	Cognito Systems LLC Top agencies Army (Department of the Army)	$9,561,060	0.8%	Rank history: #13 in FY2022, #13 in FY2023, #9 in FY2024 and #10 in FY2025; new, not ranked in FY2020.
10	Medshore Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$9,299,000	0.7%	Rank history: not on the FY2022 list, #21 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
11	Servefed Inc. Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration)	$8,786,582	0.7%	Rank history: #9 in FY2022, #7 in FY2023, #6 in FY2024 and #5 in FY2025; up 2 since FY2020.
12	Empowered Management Solutions LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$8,741,058	0.7%	Rank history: #16 in FY2022, #31 in FY2023, #33 in FY2024 and not on the FY2025 list; down 1 since FY2020.
13	Indian Health Center of Santa Clara Valley Top agencies HHS (Department of Health and Human Services)	$8,031,640	0.6%	Rank history: #89 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; up 38 since FY2020.
14	Destiny Management Services, LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$7,782,766	0.6%	Rank history: #26 in FY2022, #11 in FY2023, #10 in FY2024 and #17 in FY2025; up 4 since FY2020.
15	CS Holding Inc. Through CG Services LLC Top agencies DHA (Defense Health Agency)	$7,670,550	0.6%	Rank history: #35 in FY2022, #20 in FY2023, #14 in FY2024 and not on the FY2025 list; up 1 since FY2020.
16	T3I, Inc. Top agencies USAF (Department of the Air Force)	$7,467,000	0.6%	Rank history: #38 in FY2022, #26 in FY2023, #17 in FY2024 and #22 in FY2025; up 4 since FY2020.
17	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) DHS (Department of Homeland Security)	$7,401,225	0.6%	Rank history: #19 in FY2022, #17 in FY2023, #16 in FY2024 and #36 in FY2025; up 10 since FY2020.
18	Excelsior Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$7,146,319	0.6%	Rank history: #11 in FY2022, #8 in FY2023, #8 in FY2024 and #6 in FY2025; up 16 since FY2020.
19	Medforce Government Solutions, Inc. Top agencies DHA (Defense Health Agency) Army (Department of the Army)	$7,121,723	0.6%	Rank history: #15 in FY2022, #29 in FY2023, #54 in FY2024 and #72 in FY2025; down 7 since FY2020.
20	Fresno American Indian Health Project Top agencies HHS (Department of Health and Human Services)	$7,112,396	0.6%	Rank history: not on the FY2022 list, #84 in FY2023 and not on the FY2024–FY2025 lists; up 44 since FY2020.
21	Health Partner's Management Group, Incorporated Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$6,982,084	0.5%	Rank history: #23 in FY2022, #15 in FY2023, #11 in FY2024 and #15 in FY2025; up 4 since FY2020.
22	Avosys Technology, Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$6,788,031	0.5%	Rank history: #28 in FY2022, #12 in FY2023, #43 in FY2024 and #38 in FY2025; unchanged since FY2020.
23	Jan-Care Ambulance of North Central W.va., Inc. Top agencies VA (Department of Veterans Affairs)	$6,765,083	0.5%	Rank history: #18 in FY2022, #28 in FY2023, #24 in FY2024 and #19 in FY2025; up 5 since FY2020.
24	Brewster Ambulance Service Inc. Top agencies VA (Department of Veterans Affairs)	$6,185,143	0.5%	Rank history: #55 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; up 33 since FY2020.
25	Front Line Ems LLC Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$6,077,688	0.5%	Rank history: #30 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; up 51 since FY2020.
26	Seattle Indian Health Board Top agencies HHS (Department of Health and Human Services)	$5,645,586	0.4%	Rank history: #40 in FY2022, #35 in FY2023, #34 in FY2024 and #40 in FY2025; down 12 since FY2020.
27	Quacito LLC Top agencies Army (Department of the Army)	$5,625,391	0.4%	Rank history: #25 in FY2022 and not on the FY2023–FY2025 lists; down 4 since FY2020.
28	Bloodworks Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) HHS (Department of Health and Human Services)	$5,624,595	0.4%	Rank history: #39 in FY2022, #40 in FY2023, #46 in FY2024 and #50 in FY2025; up 5 since FY2020.
29	University of Texas System 3 awardees, including The Univeristy of Texas M.d. Anderson Cancer Center, The University of Texas Southwestern Medical Center and University of Texas Health Science Center At Houston Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$5,275,167	0.4%	Rank history: #17 in FY2022, #18 in FY2023 and not on the FY2024–FY2025 lists; down 14 since FY2020.
30	Distinctive Spectrum Healthcare Solutions JV LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$4,915,991	0.4%	Rank history: #31 in FY2022, #36 in FY2023 and not on the FY2024–FY2025 lists; up 29 since FY2020.
31	The Chenega Corporation 3 awardees, including Chenega Healthcare Services LLC and American Hospital Services Group LLC Top agencies DOE (Department of Energy) WHS (DOD Washington Headquarters Service) USAF (Department of the Air Force)	$4,876,874	0.4%	Rank history: #86 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 23 since FY2020.
32	Blood Systems Inc. 4 awardees, including Vitalant and Lifestream Blood Bank Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$4,768,421	0.4%	Rank history: #48 in FY2022, #39 in FY2023, #29 in FY2024 and #33 in FY2025; down 13 since FY2020.
33	Rocky Mountain Holdings L.L.C 2 awardees, including Air Methods, LLC Top agencies Army (Department of the Army) DOJ (Department of Justice)	$4,737,252	0.4%	Rank history: #47 in FY2022, #43 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
34	Standard Technology, Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$4,725,616	0.4%	Rank history: #46 in FY2022, #45 in FY2023, #49 in FY2024 and not on the FY2025 list; up 21 since FY2020.
35	Defense Health Professionals LLC Top agencies USAF (Department of the Air Force)	$4,641,190	0.4%	Rank history: #37 in FY2022, #38 in FY2023, #57 in FY2024 and #86 in FY2025; up 15 since FY2020.
36	Koniag, Inc. Through Kadiak LLC Top agencies DHS (Department of Homeland Security)	$4,438,891	0.3%	Rank history: #21 in FY2022, #24 in FY2023, not on the FY2024 list and #26 in FY2025; new, not ranked in FY2020.
37	Fireline Medics LLC Top agencies USDA (Department of Agriculture)	$4,390,699	0.3%	Rank history: not on the FY2022–FY2025 lists; up 67 since FY2020.
38	Business Enabled Acquisition and Technology, Inc. Top agencies DHA (Defense Health Agency)	$4,385,422	0.3%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
39	Mercy Air Service Inc. Top agencies Navy (Department of the Navy)	$4,320,713	0.3%	Rank history: not on the FY2022–FY2025 lists; down 2 since FY2020.
40	Lifecare of Alabama Inc. Top agencies VA (Department of Veterans Affairs)	$4,272,435	0.3%	Rank history: #50 in FY2022 and not on the FY2023–FY2025 lists; down 8 since FY2020.
41	Oneblood, Inc. Top agencies VA (Department of Veterans Affairs)	$4,181,661	0.3%	Rank history: #36 in FY2022, #100 in FY2023, #36 in FY2024 and #46 in FY2025; down 11 since FY2020.
42	Mindleaf Technologies Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) USSOCOM (United States Special Operations Command)	$4,076,364	0.3%	Rank history: #32 in FY2022, #60 in FY2023 and not on the FY2024–FY2025 lists; down 16 since FY2020.
43	American Medical Response of Tennessee Inc. Top agencies VA (Department of Veterans Affairs)	$3,960,031	0.3%	Rank history: #57 in FY2022, #47 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
44	Modern Healthcare Services JV LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$3,957,317	0.3%	Rank history: #60 in FY2022, #53 in FY2023, #73 in FY2024 and #82 in FY2025; up 37 since FY2020.
45	Healthcare Resolution Services, Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$3,804,559	0.3%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
46	Oregon Health & Science University Top agencies VA (Department of Veterans Affairs)	$3,687,932	0.3%	Rank history: #54 in FY2022, #19 in FY2023, #40 in FY2024 and #80 in FY2025; down 10 since FY2020.
47	The Native American Rehabilitation Association of the Northwest, Incorporated Top agencies HHS (Department of Health and Human Services)	$3,653,799	0.3%	Rank history: #71 in FY2022, #61 in FY2023, #79 in FY2024 and #79 in FY2025; down 39 since FY2020.
48	Journey Via Gurney, LLC Top agencies VA (Department of Veterans Affairs)	$3,533,885	0.3%	Rank history: #49 in FY2022, #50 in FY2023, #28 in FY2024 and #35 in FY2025; down 7 since FY2020.
49	Center for Organ Recovery & Education Top agencies VA (Department of Veterans Affairs)	$3,442,456	0.3%	Rank history: #80 in FY2022, #91 in FY2023, #59 in FY2024 and #69 in FY2025; down 28 since FY2020.
50	Arapaho Technical Services LLC Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) Navy (Department of the Navy)	$3,369,625	0.3%	Rank history: #65 in FY2022, #58 in FY2023, #21 in FY2024 and #21 in FY2025; up 10 since FY2020.
51	Naphcare LLC Top agencies DOJ (Department of Justice)	$3,288,780	0.3%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
52	Bradsher, James E Top agencies VA (Department of Veterans Affairs)	$3,281,013	0.3%	Rank history: #51 in FY2022, #57 in FY2023, #44 in FY2024 and #74 in FY2025; new, not ranked in FY2020.
53	Reliance Medical Transport, LLC Top agencies VA (Department of Veterans Affairs)	$3,239,793	0.3%	Rank history: #20 in FY2022, #10 in FY2023, #12 in FY2024 and #12 in FY2025; down 4 since FY2020.
54	General Infomatics-A Service Disabled Owned Veteran Business, Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) USSOCOM (United States Special Operations Command)	$3,193,170	0.3%	Rank history: #74 in FY2022, #48 in FY2023, not on the FY2024 list and #96 in FY2025; down 6 since FY2020.
55	Forensic Drug & Alcohol Testing LLC Top agencies DOT (Department of Transportation) NRC (Nuclear Regulatory Commission) DHS (Department of Homeland Security)	$3,078,459	0.2%	Rank history: #44 in FY2022, #37 in FY2023, #23 in FY2024 and #28 in FY2025; down 16 since FY2020.
56	Lifeline Medical Services, Inc. Top agencies VA (Department of Veterans Affairs)	$3,024,042	0.2%	Rank history: #43 in FY2022, #83 in FY2023, #60 in FY2024 and #54 in FY2025; up 6 since FY2020.
57	San Diego Blood Bank Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$2,968,536	0.2%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; up 76 since FY2020.
58	Eagle Health, LLC Top agencies Army (Department of the Army)	$2,939,731	0.2%	Rank history: #59 in FY2022 and not on the FY2023–FY2025 lists; down 6 since FY2020.
59	Bay Medic Transportation Inc. Top agencies VA (Department of Veterans Affairs)	$2,534,241	0.2%	Rank history: not on the FY2022–FY2024 lists and #62 in FY2025; up 59 since FY2020.
60	Dilligas Corp Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$2,497,290	0.2%	Rank history: #24 in FY2022 and not on the FY2023–FY2025 lists; up 14 since FY2020.
61	Caban Resources LLC Top agencies USAF (Department of the Air Force)	$2,374,146	0.2%	Rank history: #62 in FY2022, #34 in FY2023 and not on the FY2024–FY2025 lists; up 16 since FY2020.
62	Anthony & Associates, Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$2,345,475	0.2%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
63	Ambulance Management Services Limited Top agencies VA (Department of Veterans Affairs)	$2,300,903	0.2%	Rank history: #58 in FY2022, #42 in FY2023, #38 in FY2024 and #49 in FY2025; up 8 since FY2020.
64	Eagle Global Scientific, LLC Top agencies Army (Department of the Army)	$2,291,391	0.2%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
65	Gift of Hope Organ & Tissue Donor Network Top agencies VA (Department of Veterans Affairs)	$2,265,975	0.2%	Rank history: #85 in FY2022, #27 in FY2023, #48 in FY2024 and #44 in FY2025; new, not ranked in FY2020.
66	Citywide Mobile Response Corp Top agencies VA (Department of Veterans Affairs)	$2,256,905	0.2%	Rank history: not on the FY2022–FY2023 lists, #52 in FY2024 and #64 in FY2025; up 4 since FY2020.
67	Professional Staffing Associates LLC Top agencies VA (Department of Veterans Affairs)	$2,244,584	0.2%	Rank history: not on the FY2022–FY2025 lists; down 50 since FY2020.
68	Lifesouth Community Blood Centers Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$2,227,944	0.2%	Rank history: #79 in FY2022, #70 in FY2023 and not on the FY2024–FY2025 lists; down 15 since FY2020.
69	Medex Medical Transport Service Inc. Top agencies VA (Department of Veterans Affairs)	$2,163,416	0.2%	Rank history: #42 in FY2022, #25 in FY2023, #53 in FY2024 and #20 in FY2025; up 96 since FY2020.
70	CLV Enterprises, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$2,161,604	0.2%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
71	Today's Solutions, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$2,048,943	0.2%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
72	Wilderness Medics, Inc. Top agencies USDA (Department of Agriculture)	$2,025,597	0.2%	Rank history: not on the FY2022 list, #82 in FY2023, #72 in FY2024 and #89 in FY2025; up 36 since FY2020.
73	MCI Diagnostic Center LLC Top agencies DOL (Department of Labor)	$2,016,336	0.2%	Rank history: not on the FY2022–FY2025 lists; down 63 since FY2020.
74	Vet Accel Inc. Top agencies VA (Department of Veterans Affairs)	$1,996,390	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	New York Blood Center, Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$1,974,103	0.2%	Rank history: not on the FY2022–FY2025 lists; up 44 since FY2020.
76	First Care Ohio LLC Top agencies VA (Department of Veterans Affairs)	$1,907,181	0.2%	Rank history: #88 in FY2022, #55 in FY2023, #25 in FY2024 and #29 in FY2025; up 24 since FY2020.
77	Valor Network, Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$1,892,587	0.1%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
78	Able Ambulance, Inc. Top agencies VA (Department of Veterans Affairs)	$1,863,017	0.1%	Rank history: not on the FY2022–FY2025 lists; up 79 since FY2020.
79	Paramedic Systems Inc Through Alert Ambulance Service, Inc. Top agencies VA (Department of Veterans Affairs)	$1,828,586	0.1%	Rank history: not on the FY2022 list, #95 in FY2023 and not on the FY2024–FY2025 lists; up 76 since FY2020.
80	Procare Ambulance of Maryland, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$1,827,842	0.1%	Rank history: #72 in FY2022, #76 in FY2023, #77 in FY2024 and not on the FY2025 list; up 13 since FY2020.
81	The Native Project Top agencies HHS (Department of Health and Human Services)	$1,809,726	0.1%	Rank history: #93 in FY2022, #77 in FY2023, #94 in FY2024 and #98 in FY2025; down 43 since FY2020.
82	Adventure Medics LLC Top agencies USDA (Department of Agriculture)	$1,757,140	0.1%	Rank history: not on the FY2022–FY2023 lists, #56 in FY2024 and #61 in FY2025; up 214 since FY2020.
83	Erprosource360 LLC Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$1,724,220	0.1%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; up 251 since FY2020.
84	Akahi Ingenesis Partners LLC Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$1,707,822	0.1%	Rank history: #68 in FY2022, #85 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
85	Western-Star Hospital Authority Inc. Top agencies VA (Department of Veterans Affairs)	$1,706,846	0.1%	Rank history: #61 in FY2022, #23 in FY2023, not on the FY2024 list and #85 in FY2025; up 104 since FY2020.
86	Careflight Limited Top agencies Navy (Department of the Navy)	$1,693,809	0.1%	Rank history: not on the FY2022–FY2025 lists; up 120 since FY2020.
87	Washington County - Johnson City Emergency Medical Services, Inc. Top agencies VA (Department of Veterans Affairs)	$1,680,206	0.1%	Rank history: #91 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
88	UnitedHealth Group Incorporated Through Optumserve Health Services, Inc. Top agencies HHS (Department of Health and Human Services)	$1,634,980	0.1%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
89	Triple Canopy Inc. Through Centerra Group, LLC Top agencies DOS (Department of State)	$1,617,357	0.1%	Rank history: #75 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
90	Portsmouth Medic Transport LLC Top agencies VA (Department of Veterans Affairs)	$1,570,673	0.1%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
91	Priority One Medical Transport Inc. Top agencies VA (Department of Veterans Affairs)	$1,564,719	0.1%	Rank history: #100 in FY2022, not on the FY2023 list, #68 in FY2024 and #77 in FY2025; down 13 since FY2020.
92	Blackhawk Medical Transportation Inc. Top agencies VA (Department of Veterans Affairs)	$1,558,061	0.1%	Rank history: #96 in FY2022 and not on the FY2023–FY2025 lists; up 84 since FY2020.
93	Duke University 2 awardees Top agencies HHS (Department of Health and Human Services)	$1,538,150	0.1%	Rank history: #33 in FY2022, #30 in FY2023, #45 in FY2024 and #51 in FY2025; down 53 since FY2020.
94	Great Hill Solutions, LLC Top agencies DHA (Defense Health Agency)	$1,500,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Hsg, LLC Top agencies NASA (National Aeronautics and Space Administration)	$1,491,725	0.1%	Rank history: not on the FY2022–FY2025 lists; down 10 since FY2020.
96	Ready 2 Go Transport Central LLC Top agencies VA (Department of Veterans Affairs)	$1,454,524	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	D7, LLC Top agencies Army (Department of the Army)	$1,435,499	0.1%	Rank history: #98 in FY2022, #97 in FY2023 and not on the FY2024–FY2025 lists; up 53 since FY2020.
98	Coordinated Transportation Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$1,388,394	0.1%	Rank history: #84 in FY2022, not on the FY2023 list, #95 in FY2024 and not on the FY2025 list; up 107 since FY2020.
99	Asteri Consulting Services LLC Top agencies USAF (Department of the Air Force)	$1,366,420	0.1%	Rank history: #97 in FY2022, #90 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
100	Bay Cities Ambulance Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$1,352,428	0.1%	Rank history: not on the FY2022–FY2025 lists; up 73 since FY2020.

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100 of 486 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 6219

Code	Net obligations	Largest contractor
62191 Ambulance Services	$552,801,023	American Medical Response Inc.
62199 All Other Ambulatory Health Care Services	$512,637,267	STG International, Inc.

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 $1.27 billion 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 6219 contractors in FY2021?

1. American Medical Response Inc. ($387M), 2. STG International, Inc. ($115M), 3. National Marrow Donor Program ($30.2M), 4. The American National Red Cross ($22.3M), 5. Marshfield Clinic Health System, Inc. ($20M), 6. CHS Middle East LLC ($20M), 7. Team Health Inc. ($14.1M), 8. United Medevac Solutions, Inc. ($10.4M), 9. Cognito Systems LLC ($9.56M), 10. Medshore Ambulance Service Inc. ($9.3M).

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