NAICS Code 621910 — Ambulance Services

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 62191 (Ambulance Services).

Code	621910
Title	Ambulance Services
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	$22.5 million in average annual receipts

Official definition (2022 NAICS)

This industry comprises establishments primarily engaged in providing transportation of patients by ground or air, along with medical care. These services are often provided during a medical emergency but are not restricted to emergencies. The vehicles are equipped with lifesaving equipment operated by medically trained personnel.

Cross-References.

Is a business under 621910 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 621910 qualifies as a small business if it does not exceed $22.5 million in average annual receipts. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — receipts are averaged over the latest 5 fiscal years.

Where 621910 sits in the hierarchy

Level	Code	Title
Sector	62	Health Care and Social Assistance
Subsector	621	Ambulatory Health Care Services
Industry Group	6219	Other Ambulatory Health Care Services
NAICS Industry	62191	Ambulance Services
National Industry	621910	Ambulance Services

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
4119	Local Passenger Transportation, Not Elsewhere Classified
4522	Air Transportation, Nonscheduled

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.