NAICS Code 621999: All Other Miscellaneous Ambulatory Health Care Services
National industry
SBA small business size standard: $20.5 million in average annual receipts
Definition
This U.S. industry comprises establishments primarily engaged in providing ambulatory health care services (except offices of physicians, dentists, and other health practitioners; outpatient care centers; medical and diagnostic laboratories; home health care providers; ambulances; and blood and organ banks).
Government contracts for this service: PSC Q201 Managed Healthcare Services and PSC Q999 Other Medical Services
Code facts
- Part of
-
-
62
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621
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6219
- 62199
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6219
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621
-
62
- Contract awards
- 192 In the last 12 months
- Contract obligations
- $335,887,022 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 621999
- Blood pressure screening facilities
- Blood pressure screening services
- Employee drug testing services
- Health screening services (except by offices of health practitioners)
- Hearing testing services (except by offices of audiologists)
- Medical care management services
- Medical case management services
- Pacemaker monitoring services
- Physical fitness evaluation services (except by offices of health practitioners)
- Smoking cessation programs
- Stop smoking clinics
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $36,261,102 |
| FY2026 | $496,094,899 |
| FY2025 | $335,887,022 |
| FY2024 | $296,841,625 |
| FY2023 | $702,755,283 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Amergis Healthcare Staffing, Inc. | $59,804,784 | |
| 2 | The Arora Group, Inc. | $52,614,801 | |
| 3 | Cognosante MVH LLC | $39,511,149 | |
| 4 | Servefed Inc. | $38,661,909 | |
| 5 | Ingenesis Inc. | $31,965,424 | |
| 6 | Cognito Systems LLC | $29,575,834 | |
| 7 | STG International, Inc. | $22,348,833 | |
| 8 | North East South West Healthcare Solutions, LLC | $15,115,927 | |
| 9 | Medtronic Care Management Services, LLC | $14,703,257 | |
| 10 | Acuity-Chs, LLC | $14,172,947 |
See the full FY2025 ranking of NAICS 621999 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Homeland Security | $188,138,607 | |
| 2 | Department of Health and Human Services | $96,704,523 | |
| 3 | Defense Health Agency | $75,481,803 | |
| 4 | Department of Veterans Affairs | $59,929,681 | |
| 5 | Department of the Army | $46,935,222 | |
| 6 | Air Force | $23,263,531 | |
| 7 | Department of Agriculture | $11,626,701 | |
| 8 | Department of Transportation | $8,550,055 | |
| 9 | Department of Justice | $6,414,463 | |
| 10 | Department of Energy | $4,652,029 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Q201 Medical – Managed Healthcare | $276,696,287 | |
| 2 | Q999 Other Medical Services | $154,168,573 | |
| 3 | Q802 Clerical Medical Support | $27,848,764 | |
| 4 | Q401 Nursing | $12,155,545 | |
| 5 | Q301 Reference Laboratory Testing | $11,820,570 | |
| 6 | Q403 Medical Evaluation and Screening Services | $10,526,029 | |
| 7 | Q601 Medical Coding and Auditing | $10,343,817 | |
| 8 | Q801 Medical Appointing Services | $9,762,263 | |
| 9 | U099 Other Education and Training Services | $6,524,599 | |
| 10 | Q702 Technical Medical Support | $3,263,773 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Maryland | $115,895,307 | |
| 2 | Virginia | $76,893,950 | |
| 3 | Texas | $68,302,314 | |
| 4 | Colorado | $53,989,473 | |
| 5 | Louisiana | $51,765,507 | |
| 6 | Florida | $37,965,420 | |
| 7 | California | $20,988,811 | |
| 8 | District of Columbia | $14,889,410 | |
| 9 | Georgia | $14,680,697 | |
| 10 | Montana | $7,179,473 | |
| 11 | Arizona | $6,705,122 | |
| 12 | New Mexico | $5,509,995 | |
| 13 | Oregon | $3,918,378 | |
| 14 | South Dakota | $3,536,991 | |
| 15 | Hawaii | $3,248,133 | |
| 16 | Tennessee | $2,909,432 | |
| 17 | Washington | $2,609,193 | |
| 18 | North Carolina | $2,194,667 | |
| 19 | Guam | $1,647,226 | |
| 20 | Alaska | $1,621,530 | |
| 21 | Pennsylvania | $1,551,519 | |
| 22 | New Jersey | $1,495,376 | |
| 23 | Nevada | $1,352,780 | |
| 24 | Mississippi | $1,312,209 | |
| 25 | Wisconsin | $1,304,407 | |
| 26 | Minnesota | $1,215,801 | |
| 27 | Alabama | $1,081,296 | |
| 28 | Utah | $1,067,932 | |
| 29 | South Carolina | $1,019,268 | |
| 30 | Ohio | $735,427 | |
| 31 | Oklahoma | $604,895 | |
| 32 | Nebraska | $470,703 | |
| 33 | North Dakota | $447,427 | |
| 34 | Idaho | $411,232 | |
| 35 | New York | $377,209 | |
| 36 | Indiana | $274,141 | |
| 37 | Connecticut | $272,555 | |
| 38 | West Virginia | $239,579 | |
| 39 | Kansas | $217,327 | |
| 40 | Kentucky | $162,115 | |
| 41 | Massachusetts | $119,623 | |
| 42 | Wyoming | $111,464 | |
| 43 | Arkansas | $105,365 | |
| 44 | Vermont | $93,734 | |
| 45 | Puerto Rico | $70,044 | |
| 46 | Michigan | $19,531 | |
| 47 | New Hampshire | $8,900 |
Show all 47
Shares are of everything obligated under NAICS 621999 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 38 more
Latest 48 of 2,229 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
Show all 11
Proposed size standard changes
| Proposed rule | Published | Comments |
|---|---|---|
| Small Business Size Standards: Monetary-Based Industry Size Standards | Closed Oct 21, 2025No final rule found |
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 621999?
NAICS 621999 is All Other Miscellaneous Ambulatory Health Care Services, a national industry in NAICS 62, Health Care and Social Assistance.
What is the NAICS code for stop smoking clinics?
The NAICS code for stop smoking clinics is 621999, All Other Miscellaneous Ambulatory Health Care Services.
What is the NAICS code for smoking cessation programs?
The NAICS code for smoking cessation programs is 621999, All Other Miscellaneous Ambulatory Health Care Services.
What is the NAICS code for pacemaker monitoring services?
The NAICS code for pacemaker monitoring services is 621999, All Other Miscellaneous Ambulatory Health Care Services.
When did the size standard for NAICS 621999 last change?
The most recent Federal Register rule on record that names NAICS 621999 in the SBA's size standards is "Small Business Size Standards: Adjustment of Monetary-Based Size Standards, Disadvantage Thresholds, and 8(a) Eligibility Thresholds for Inflation" (87 FR 69118), published Nov 17, 2022 and effective Dec 19, 2022.
How much do federal agencies spend under NAICS 621999?
Federal contracts under NAICS 621999 obligated $335,887,022 in fiscal year 2025 and $1,867,839,931 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 621999?
The contractors with the most obligated under NAICS 621999 in fiscal years 2026 and 2027 are Amergis Healthcare Staffing, Inc. ($59,804,784); The Arora Group, Inc. ($52,614,801); and Cognosante MVH LLC ($39,511,149).
Which agencies buy the most under NAICS 621999?
The agencies that obligated the most under NAICS 621999 in fiscal years 2026 and 2027 are Department of Homeland Security ($188,138,607), Department of Health and Human Services ($96,704,523) and Defense Health Agency ($75,481,803).
Which PSC codes are used with NAICS 621999?
The PSC codes with the most obligated under NAICS 621999 in fiscal years 2026 and 2027 are Q201 Medical – Managed Healthcare, Q999 Other Medical Services and Q802 Clerical Medical Support.
Where is the work under NAICS 621999 performed?
By place of performance, the states with the most contract obligations under NAICS 621999 over the last 12 months are Maryland ($115,895,307), Virginia ($76,893,950) and Texas ($68,302,314).
What is the latest contract opportunity under NAICS 621999?
The latest contract opportunity under NAICS 621999 is Region IX Emergency Medical Membership Access, solicitation from FEMA Community Survivor Assistance Section, posted November 6, 2026.
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