621210 Offices of Dentists

Official definition

This industry comprises establishments of health practitioners having the degree of D.M.D. (Doctor of Dental Medicine), D.D.S. (Doctor of Dental Surgery), or D.D.Sc. (Doctor of Dental Science) primarily engaged in the independent practice of general or specialized dentistry or dental surgery. These practitioners operate private or group practices in their own offices (e.g., centers, clinics) or in the facilities of others, such as hospitals or HMO medical centers. They can provide either comprehensive preventive, cosmetic, or emergency care, or specialize in a single field of dentistry.

Source: US Census Bureau, 2022 NAICS descriptions.

When to use a different code

Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:

• Establishments known as dental laboratories primarily engaged in making dentures, artificial teeth, and orthodontic appliances to order for dentists are classified in U.S. Industry 339116, Dental Laboratories.
• Establishments of dental hygienists primarily engaged in cleaning teeth and gums or establishments of denturists primarily engaged in taking impressions for and fitting dentures are classified in U.S. Industry 621399, Offices of All Other Miscellaneous Health Practitioners.
• Outpatient community health clinics with health practitioners from multiple industries are classified in U.S. Industry 621498, All Other Outpatient Care Centers.

Source: US Census Bureau, 2022 NAICS cross-references.

Businesses that use this code

• Dental practice

Activities listed under 621210

The Census index assigns these 15 activities to this code. If your business matches one, this is your code.

• DDSs' (doctors of dental surgery) offices (e.g., centers, clinics)
• Dental surgeons' offices (e.g., centers, clinics)
• Dentists' offices (e.g., centers, clinics)
• DMDs' (doctors of dental medicine) offices (e.g., centers, clinics)
• Doctors of dental medicine (DMDs) offices (e.g., centers, clinics)
• Doctors of dental surgery (DDSs) offices (e.g., centers, clinics)
• Endodontists' offices (e.g., centers, clinics)
• Family dentists' offices (e.g., centers, clinics)
• Oral and maxillofacial surgeons' offices (e.g., centers, clinics)
• Oral pathologists' offices (e.g., centers, clinics)
• Orthodontists' offices (e.g., centers, clinics)
• Pathologists', oral, offices (e.g., centers, clinics)
• Periodontists' offices (e.g., centers, clinics)
• Prosthodontists' offices (e.g., centers, clinics)
• Surgeons', dental, offices (e.g., centers, clinics)

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 621210

To count as a small business for SBA loans and federal contracts under NAICS 621210, your business (including affiliates) must not exceed $9 million in average annual receipts. Check your business.

Source: SBA table of size standards, effective March 17, 2023.

Closest UK SIC 2007 codes

There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 8620), so treat them as a starting point and check the definition.

• 86210General medical practice activitiesUK SIC
• 86220Specialists medical practice activitiesUK SIC
• 86230Dental practice activitiesUK SIC

Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.