Outpatient Mental Health and Substance Abuse Centers
Official NAICS Description
Source: U.S. Census Bureau 2022 NAICS
📘 Source: U.S. Census Bureau — 2022 NAICS Manual
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)
✓ Small Business Eligibility at a Glance
Based on SBA Table of Small Business Size Standards (2024)
Size Standard
$19M average annual receipts
Measurement Period
3-year average
Standard Type
Revenue-Based
Applies To
All contracts under NAICS 621420
Set-Aside Programs
8(a), WOSB, HUBZone, SDVOSB
Certification Required
No (self-certify in SAM.gov)
Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.
Cross-References
The following activities are classified elsewhere in the NAICS system:
→Establishments known and licensed as hospitals primarily engaged in the inpatient treatment of mental health and substance abuse illnesses with an emphasis on medical treatment and monitoring are classified in Industry 622210, Psychiatric and Substance Abuse Hospitals;
→Establishments primarily engaged in the inpatient treatment of mental health and substance abuse illnesses with an emphasis on residential care and counseling rather than medical treatment are classified in Industry 623220, Residential Mental Health and Substance Abuse Facilities;
→Establishments of physicians primarily engaged in the independent practice of psychiatry or psychoanalysis are classified in U.S. Industry 621112, Offices of Physicians, Mental Health Specialists;
→Establishments of independent mental health practitioners (except physicians) are classified in Industry 621330, Offices of Mental Health Practitioners (except Physicians); and
→Establishments primarily engaged in providing nonresidential counseling services for substance abuse, mental health, suicide intervention, and other crisis intervention social services to children and youth, the elderly, persons with disabilities, and all other individuals and families are classified in Industry Group 6241, Individual and Family Services.
How to Use NAICS 621420 in SAM.gov
NAICS code 621420 — Outpatient Mental Health and Substance Abuse Centers — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Outpatient Care Centers space will be able to find your business.
If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of $19M average annual receipts, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 621420.
NAICS code 621420 is 'Outpatient Mental Health and Substance Abuse Centers', classified under the Health Care and Social Assistance sector (NAICS 62). 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 sub
What is the SBA small business size standard for NAICS code 621420?
The SBA defines a small business under NAICS code 621420 (Outpatient Mental Health and Substance Abuse Centers) as one with $19M average annual receipts. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.
How do I register NAICS code 621420 in SAM.gov?
To register NAICS code 621420 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 621420 (Outpatient Mental Health and Substance Abuse Centers) to your NAICS code list. You may designate one code as your Primary NAICS code.