NAICS Code 621999 — All Other Miscellaneous Ambulatory Health Care Services

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 2 national industries under 62199 (All Other Ambulatory Health Care Services).

Code	621999
Title	All Other Miscellaneous Ambulatory Health Care Services
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	$20.5 million in average annual receipts

Official definition (2022 NAICS)

This U.S. industry comprises establishments primarily engaged in providing ambulatory health care services (except offices of physicians, dentists, and other health practitioners; outpatient care centers; medical and diagnostic laboratories; home health care providers; ambulances; and blood and organ banks).

Illustrative Examples:

Health screening services (except by offices of health practitioners)

Physical fitness evaluation services (except by offices of health practitioners)

Hearing testing services (except by offices of audiologists)

Smoking cessation programs

Pacemaker monitoring services

Cross-References.

Is a business under 621999 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 621999 qualifies as a small business if it does not exceed $20.5 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 621999 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	62199	All Other Ambulatory Health Care Services
National Industry	621999	All Other Miscellaneous Ambulatory Health Care 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
8099	Health and Allied Services, Not Elsewhere Classified

Related National Industry codes

• 621991 — Blood and Organ Banks

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.