NAICS 621910 size standard: Ambulance Services
Sector 62—Health Care and Social Assistance › Subsector 621—Ambulatory Health Care Services
$22.5 million
average annual receipts
A business whose primary industry is NAICS 621910 (Ambulance Services) is small for SBA and federal contracting purposes if its average annual receipts, including affiliates, are no more than $22.5 million.
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NAICS 621910 on AwardWatchdog
Before you rely on this
- Affiliates count. SBA adds the receipts or employees of your affiliates (companies that control you, that you control, or that share common ownership or management) to yours. See 13 CFR 121.103.
- Receipts are a 5-year average. Average annual receipts are generally your total receipts over your last 5 completed fiscal years divided by 5 (13 CFR 121.104).
- Employees are a 24-month average. Employee-based standards use your average number of employees per pay period over the preceding 24 completed calendar months, counting part-time and temporary staff (13 CFR 121.106).
- The contract decides the code. For a federal contract, the contracting officer assigns one NAICS code in the solicitation, and that code’s size standard is the one that counts.
- Check officially. Use the official SBA Size Standards Tool and keep your SAM.gov registration current.
Not legal or professional advice. This is a free estimate from AwardWatchdog based on SBA’s published table. AwardWatchdog is not affiliated with SBA or the U.S. government. Only SBA can make a formal size determination.
Common questions
What is the SBA size standard for NAICS 621910?
A business whose primary industry is NAICS 621910 (Ambulance Services) is small for SBA and federal contracting purposes if its average annual receipts, including affiliates, are no more than $22.5 million. The standard comes from SBA’s table at 13 CFR 121.201 (last amended effective March 17, 2023).
How are average annual receipts calculated?
Generally, total receipts over the most recently completed 5 fiscal years divided by 5, including affiliates (13 CFR 121.104). Firms in business for less than 5 years use a different calculation.
Is this an official size determination?
No. This page is an estimate from AwardWatchdog based on SBA’s published table. Use the official SBA Size Standards Tool at sba.gov and only SBA can make a formal size determination.
Related codes in Ambulatory Health Care Services
621111 Offices of Physicians (except Mental Health Specialists) ($16.0M) · 621112 Offices of Physicians, Mental Health Specialists ($13.5M) · 621210 Offices of Dentists ($9.0M) · 621310 Offices of Chiropractors ($9.0M) · 621320 Offices of Optometrists ($9.0M) · 621330 Offices of Mental Health Practitioners (except Physicians) ($9.0M) · 621340 Offices of Physical, Occupational and Speech Therapists and Audiologists ($12.5M) · 621391 Offices of Podiatrists ($9.0M) · 621399 Offices of All Other Miscellaneous Health Practitioners ($10.0M) · 621410 Family Planning Centers ($19.0M) · 621420 Outpatient Mental Health and Substance Abuse Centers ($19.0M) · 621491 HMO Medical Centers ($44.5M)
Source: 13 CFR 121.201 (SBA table of small business size standards, eCFR current as of October 15, 2026; last amended effective March 17, 2023). See also SBA’s table of size standards.
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