2022 NAICS national industry in sector 81 Other Services (except Public Administration)

813920 Professional Organizations

NAICS 813920 is the US industry code for professional organizations. It covers establishments primarily engaged in promoting the professional interests of their members and the profession as a whole.

Code: 813920 (2022 NAICS)
Title: Professional Organizations
Part of: Business, Professional, Labor, Political, and Similar Organizations
SBA small business limit: Average annual receipts up to $23.5 million
Closest UK SIC: 94120 (details)

Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.

Official definition

This industry comprises establishments primarily engaged in promoting the professional interests of their members and the profession as a whole. These establishments may conduct research; develop statistics; sponsor quality and certification standards; lobby public officials; or publish newsletters, books, or periodicals for distribution to their members.

Examples Census gives

Bar associations
Learned societies
Dentists' associations
Peer review boards
Engineers' associations
Professional standards review boards
Health professionals' associations
Scientists' associations

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:

Promoting the business interests of their members are classified in Industry 813910, Business Associations.
Lobbying public officials (i.e., lobbyists) are classified in Industry 541820, Public Relations Agencies.

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

Activities listed under 813920

The Census index assigns these 25 activities to this code. If your business matches one, this is your code.

Accountants' associations
Architects' associations
Bar associations
Consultants' associations
Dentists' associations
Dietitians' associations
Educators' associations
Engineers' associations
Health professionals' associations
Hospital administrators' associations
Learned societies
Medical associations
Nurses' associations
Occupational therapists' associations
Optometrists' associations
Peer review boards
Personnel management associations
Pharmacists' associations
Professional associations
Professional membership associations
Professional standards review boards
Psychologists' associations
Scientific associations
Social workers' associations
Standards review committees, professional

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 813920

To count as a small business for SBA loans and federal contracts under NAICS 813920, your business (including affiliates) must not exceed $23.5 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: 9412), so treat them as a starting point and check the definition.

94120Activities of professional membership organizationsUK SIC

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

Similar codes to compare

Data last changed November 14, 2026. How this page is built.