NAICS 621420:
Outpatient Mental Health and Substance Abuse Centers
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.
Outpatient alcoholism treatment centers and clinics (except hospitals)Outpatient mental health centers and clinics (except hospitals)Outpatient detoxification centers and clinics (except hospitals)+2 examples
Matching SIC code: 8093 Specialty Outpatient Facilities, Not Elsewhere Classified
Where it sits
- 62Health Care and Social AssistanceSector
- 621Ambulatory Health Care ServicesSubsector
- 6214Outpatient Care CentersIndustry group
- 62142Outpatient Mental Health and Substance Abuse CentersNAICS industry
- 621420Outpatient Mental Health and Substance Abuse CentersNational industry
Largest companies with NAICS 621420
Updated Nov 9, 2026| Rank | Company | Headquarters | Employees |
|---|---|---|---|
| 1 |  LifeStance Healthlifestance.com | Scottsdale, US | 5.7K |
| 2 |  Headwayheadway.co | New York, US | 5K |
| 3 |  Spring Healthspringhealth.com | New York, US | 3.9K |
| 4 |  Centerstonecenterstone.org | Nashville, US | 3.8K |
| 5 |  Telecare Corporationtelecarecorp.com | Alameda, US | 3.4K |
| 6 |  Charlie Healthcharliehealth.com | Bozeman, US | 3.4K |
| 7 |  Grow Therapygrowtherapy.com | New York, US | 3.3K |
| 8 |  Centria Autismcentriahealthcare.com | Farmington, US | 3.1K |
| 9 |  Lyra Healthlyrahealth.com | Burlingame, US | 3K |
| 10 |  ABS Kidsabskids.com | Los Angeles, US | 2.2K |
Not this code?
Similar activities the Census classifies elsewhere.
- 622210Psychiatric and Substance Abuse HospitalsEstablishments 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
- 623220Residential Mental Health and Substance Abuse FacilitiesEstablishments 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
- 621112Offices of Physicians, Mental Health SpecialistsEstablishments of physicians primarily engaged in the independent practice of psychiatry or psychoanalysis
- 621330Offices of Mental Health Practitioners (except Physicians)Establishments of independent mental health practitioners (except physicians)
Questions about NAICS 621420
Which businesses use NAICS 621420?
What SIC code matches NAICS 621420?
How many companies have NAICS 621420?
Code titles, definitions, examples and SIC matches: NAICS 2022 and the Census concordances, US Census Bureau. Company counts and lists: Crustdata, companies with a website, each by its primary code, updated weekly. Employee counts are estimates.