621910 — Ambulance Services
Description
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 (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 4119 - Local Passenger Transportation, NEC (via SIC1987:4119→NAICS1997:62191→2002:621910→2007:621910→2012:621910→2017:621910→2022:621910)
- SIC 4522 - Air Transportation, Nonscheduled (via SIC1987:4522→NAICS1997:62191→2002:621910→2007:621910→2012:621910→2017:621910→2022:621910)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC Q701 — Specialized Medical Support
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 621910 valid in 2022? ▾
Yes, 621910 is a valid 6-digit 2022 NAICS national industry code representing 'Ambulance Services' under Sector 62 in the official classification index.
What is the SBA size standard for NAICS code 621910? ▾
The Small Business Administration (SBA) has established a small business size standard of $22,500,000 for NAICS code 621910 (Ambulance Services), calculated based on receipts.
What is the legacy SIC equivalent for NAICS 621910? ▾
According to official Census Bureau concordance tables, NAICS code 621910 (Ambulance Services) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 4119 - Local Passenger Transportation, NEC, 4522 - Air Transportation, Nonscheduled.
Related Pages & Tools
Further regulatory reference links for NAICS code 621910:
- 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.
- NAICS 621910 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Ambulance Services).
- 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.