621420 — Outpatient Mental Health and Substance Abuse Centers
Description
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 (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
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)
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 8093 - Specialty Outpatient Facilities, NEC (via SIC1987:8093→NAICS1997:62142→2002:621420→2007:621420→2012:621420→2017:621420→2022:621420)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC Q519 — Behavioral and Mental Health
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 621420 valid in 2022? ▾
Yes, 621420 is a valid 6-digit 2022 NAICS national industry code representing 'Outpatient Mental Health and Substance Abuse Centers' under Sector 62 in the official classification index.
What is the SBA size standard for NAICS code 621420? ▾
The Small Business Administration (SBA) has established a small business size standard of $19,000,000 for NAICS code 621420 (Outpatient Mental Health and Substance Abuse Centers), calculated based on receipts.
What is the legacy SIC equivalent for NAICS 621420? ▾
According to official Census Bureau concordance tables, NAICS code 621420 (Outpatient Mental Health and Substance Abuse Centers) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 8093 - Specialty Outpatient Facilities, NEC.
Related Pages & Tools
Further regulatory reference links for NAICS code 621420:
- Sector 62 Directory Hub — List of related industries in the Health Care and Social Assistance sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 621420 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Outpatient Mental Health and Substance Abuse Centers).
- IRS PBA Code for Mental Health Counseling — Principal Business Activity tax reporting details.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.