NAICS Code 621493: Freestanding Ambulatory Surgical and Emergency Centers
National industry
SBA small business size standard: $19 million in average annual receipts
Definition
This U.S. industry comprises establishments with physicians and other medical staff primarily engaged in (1) providing surgical services (e.g., orthoscopic and cataract surgery) on an outpatient basis or (2) providing emergency care services (e.g., setting broken bones, treating lacerations, or tending to patients suffering injuries as a result of accidents, trauma, or medical conditions necessitating immediate medical care) on an outpatient basis.
Outpatient surgical establishments have specialized facilities, such as operating and recovery rooms, and specialized equipment, such as anesthetic or X-ray equipment.
Government contracts for this service: PSC Q523 Surgery Services
Code facts
- Part of
-
-
62
-
621
-
6214
- 62149
-
6214
-
621
-
62
- Contract awards
- 6 In the last 12 months
- Contract obligations
- $13,780,721 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 621493
- Ambulatory surgical centers and clinics, freestanding
- Emergency medical centers and clinics, freestanding
- Freestanding ambulatory surgical centers and clinics
- Freestanding emergency medical centers and clinics
- Laser surgery centers, freestanding
- Trauma centers (except hospitals), freestanding
- Urgent medical care centers and clinics (except hospitals), freestanding
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 | $0 |
| FY2026 | $7,817,121 |
| FY2025 | $13,780,721 |
| FY2024 | $11,937,577 |
| FY2023 | $29,186,994 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Banner Phoenix Surgery Center, LLC | $2,600,000 | |
| 2 | Chenega Government Mission Solutions, LLC | $2,142,576 | |
| 3 | Lowcountry Surgery Center, LLC | $1,982,417 | |
| 4 | White Stone Spectrum Healthcare Resources LLC | $1,876,202 | |
| 5 | Sterling Medical Associates, Inc. | $659,595 | |
| 6 | Wolf Lake Services, LLC | $309,913 | |
| 7 | Diocesan Council For The Society Of ST Vincent De Paul Diocese Phoenix | $29,592 | |
| 8 | Advanced Laser Services, LLC | $26,964 |
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Veterans Affairs | $6,515,175 | |
| 2 | Department of Health and Human Services | $1,087,851 | |
| 3 | Nuclear Regulatory Commission | $309,913 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Q523 Surgery Services | $2,600,000 | |
| 2 | Q529 Emergency Medicine Services | $2,142,576 | |
| 3 | Q511 Ophthalmology & Optometry | $1,982,417 | |
| 4 | Q509 Family & Internal Medicine Services | $1,876,202 | |
| 5 | Q999 Other Medical Services | $659,595 | |
| 6 | G004 Social Rehabilitation Services | $29,592 | |
| 7 | W099 Lease or Rental of Equipment: Miscellaneous | $26,964 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Arizona | $2,491,671 | |
| 2 | South Carolina | $1,982,417 | |
| 3 | Minnesota | $1,876,202 | |
| 4 | Oklahoma | $1,087,851 | |
| 5 | Ohio | $659,595 | |
| 6 | Virginia | $309,913 | |
| 7 | California | $26,964 |
Shares are of everything obligated under NAICS 621493 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 89 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
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 621493?
NAICS 621493 is Freestanding Ambulatory Surgical and Emergency Centers, a national industry in NAICS 62, Health Care and Social Assistance.
What is the NAICS code for freestanding emergency medical centers and clinics?
The NAICS code for freestanding emergency medical centers and clinics is 621493, Freestanding Ambulatory Surgical and Emergency Centers.
What is the NAICS code for laser surgery centers, freestanding?
The NAICS code for laser surgery centers, freestanding is 621493, Freestanding Ambulatory Surgical and Emergency Centers.
What is the NAICS code for trauma centers (except hospitals), freestanding?
The NAICS code for trauma centers (except hospitals), freestanding is 621493, Freestanding Ambulatory Surgical and Emergency Centers.
When did the size standard for NAICS 621493 last change?
The most recent Federal Register rule on record that names NAICS 621493 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 621493?
Federal contracts under NAICS 621493 obligated $13,780,721 in fiscal year 2025 and $62,722,414 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 621493?
The contractors with the most obligated under NAICS 621493 in fiscal years 2026 and 2027 are Banner Phoenix Surgery Center, LLC ($2,600,000); Chenega Government Mission Solutions, LLC ($2,142,576); and Lowcountry Surgery Center, LLC ($1,982,417).
Which agencies buy the most under NAICS 621493?
The agencies that obligated the most under NAICS 621493 in fiscal years 2026 and 2027 are Department of Veterans Affairs ($6,515,175), Department of Health and Human Services ($1,087,851) and Nuclear Regulatory Commission ($309,913).
Which PSC codes are used with NAICS 621493?
The PSC codes with the most obligated under NAICS 621493 in fiscal years 2026 and 2027 are Q523 Surgery Services, Q529 Emergency Medicine Services and Q511 Ophthalmology & Optometry.
Where is the work under NAICS 621493 performed?
By place of performance, the states with the most contract obligations under NAICS 621493 over the last 12 months are Arizona ($2,491,671), South Carolina ($1,982,417) and Minnesota ($1,876,202).
What is the latest contract opportunity under NAICS 621493?
The latest contract opportunity under NAICS 621493 is RFI for medical support services to DoS employees and trainees at the Occupational Medical Clinic, pre-solicitation from Office of Acquisition Management, posted April 20, 2026.
On GovTribe
See everything under NAICS 621493
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