621493 — Freestanding Ambulatory Surgical and Emergency Centers
Description
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.
Illustrative Examples
- 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)
Overview Facts
| NAICS Code | 621493 |
|---|---|
| Industry Title | Freestanding Ambulatory Surgical and Emergency Centers |
| SBA Size Standard | $19,000,000 |
| IRS PBA Code | 621493 (exact match) |
| Sectors Hierarchy | Sector 62 → 621 → 6214 |
| Source / Verified | US Census 2022 NAICS Manual / 2026-06-28 |
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 8011 - Offices and Clinics of Doctors of Medicine (via SIC1987:8011→NAICS1997:621493→2002:621493→2007:621493→2012:621493→2017:621493→2022:621493)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 621493:
- Sector 62 Directory Hub — List of related industries in the Health Care and Social Assistance sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.
Related Industries in 6214
Frequently Asked Questions (FAQ)
Is 621493 a valid 2022 NAICS code?
NAICS 621493 is 'Freestanding Ambulatory Surgical and Emergency Centers', a 2022 U.S. national industry under Sector 62 (Health Care and Social Assistance); the SBA small-business size standard is $19,000,000.
What is the SBA size standard for NAICS 621493?
The SBA small business size standard for NAICS 621493 is $19,000,000 (based on receipts).
What is the legacy SIC code mapping for 621493?
NAICS code 621493 maps to the legacy 1987 SIC codes: 8011 - Offices and Clinics of Doctors of Medicine.