NAICS Code 621420 — Outpatient Mental Health and Substance Abuse Centers

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 62142 (Outpatient Mental Health and Substance Abuse Centers).

Code	621420
Title	Outpatient Mental Health and Substance Abuse Centers
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	$19 million in average annual receipts

Official definition (2022 NAICS)

This industry comprises establishments with medical staff primarily engaged in providing outpatient services related to the diagnosis and treatment of mental health disorders and alcohol and other substance abuse. These establishments generally treat patients who do not require inpatient treatment. They may provide a counseling staff and information regarding a wide range of mental health and substance abuse issues and/or refer patients to more extensive treatment programs, if necessary.

Illustrative Examples:

Outpatient alcoholism treatment centers and clinics (except hospitals)

Outpatient mental health centers and clinics (except hospitals)

Outpatient detoxification centers and clinics (except hospitals)

Outpatient substance abuse treatment centers and clinics (except hospitals)

Outpatient drug addiction treatment centers and clinics (except hospitals)

Cross-References.

Is a business under 621420 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 621420 qualifies as a small business if it does not exceed $19 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 621420 sits in the hierarchy

Level	Code	Title
Sector	62	Health Care and Social Assistance
Subsector	621	Ambulatory Health Care Services
Industry Group	6214	Outpatient Care Centers
NAICS Industry	62142	Outpatient Mental Health and Substance Abuse Centers
National Industry	621420	Outpatient Mental Health and Substance Abuse Centers

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
8093	Specialty Outpatient Facilities, Not Elsewhere Classified

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.