621493 Freestanding Ambulatory Surgical and Emergency Centers

Official 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.

Examples Census gives

• Freestanding ambulatory surgical centers and clinics
• Freestanding emergency medical centers and clinics
• Freestanding trauma centers (except hospitals)
• Urgent medical care centers and clinics (except hospitals)

Source: US Census Bureau, 2022 NAICS descriptions.

When to use a different code

Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:

• Outpatient community health clinics with health practitioners from multiple industries are classified in U.S. Industry 621498, All Other Outpatient Care Centers.
• Establishments known and licensed as hospitals that also perform ambulatory surgery and emergency room services are classified in Subsector 622, Hospitals.

Source: US Census Bureau, 2022 NAICS cross-references.

Businesses that use this code

• Medical practice (doctor's office)

Activities listed under 621493

The Census index assigns these 7 activities to this code. If your business matches one, this is your code.

• 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

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 621493

To count as a small business for SBA loans and federal contracts under NAICS 621493, your business (including affiliates) must not exceed $19 million in average annual receipts. Check your business.

Source: SBA table of size standards, effective March 17, 2023.

Closest UK SIC 2007 codes

There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 8620), so treat them as a starting point and check the definition.

• 86210General medical practice activitiesUK SIC
• 86220Specialists medical practice activitiesUK SIC
• 86230Dental practice activitiesUK SIC

Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.

Similar codes to compare

• 621491HMO Medical Centers
• 621492Kidney Dialysis Centers
• 621498All Other Outpatient Care Centers