NAICS Code 621420: Outpatient Mental Health and Substance Abuse Centers
National industry
SBA small business size standard: $19 million in average annual receipts
Definition
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.
Government contracts for this service: PSC G004 Social Rehabilitation Services
Code facts
- Part of
-
-
62
-
621
-
6214
- 62142
-
6214
-
621
-
62
- Contract awards
- 252 In the last 12 months
- Contract obligations
- $51,361,354 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 621420
- Alcoholism treatment centers and clinics (except hospitals), outpatient
- Detoxification centers and clinics (except hospitals), outpatient
- Drug addiction treatment centers and clinics (except hospitals), outpatient
- Mental health centers and clinics (except hospitals), outpatient
- Outpatient mental health centers and clinics (except hospitals)
- Outpatient treatment centers and clinics (except hospitals) for substance abuse (i.e., alcoholism, drug addiction)
- Outpatient treatment centers and clinics for alcoholism
- Outpatient treatment centers and clinics for drug addiction
- Psychiatric centers and clinics (except hospitals), outpatient
- Substance abuse treatment centers and clinics (except hospitals), outpatient
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | -$128,510 |
| FY2026 | $49,311,668 |
| FY2025 | $51,361,354 |
| FY2024 | $41,110,801 |
| FY2023 | $47,378,507 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Wellpath LLC | $10,326,019 | |
| 2 | Western Alternative Corrections, Inc. | $4,686,460 | |
| 3 | Inc. S.tacey Hoyt, Phd | $4,320,675 | |
| 4 | South Florida Clinical Treatment Centers Inc. | $2,868,760 | |
| 5 | Aim Counseling LLC | $2,625,393 | |
| 6 | Transitional Care Management LLP | $1,638,733 | |
| 7 | Native Directions, Inc. | $1,570,357 | |
| 8 | American Indian Council On Alcoholism Inc. | $1,442,933 | |
| 9 | Fondren, Gloria Dean | $1,422,409 | |
| 10 | Rhode Island Indian Council Inc. | $1,306,147 |
See the full FY2025 ranking of NAICS 621420 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Justice | $41,326,696 | |
| 2 | Department of Health and Human Services | $6,302,168 | |
| 3 | Department of Veterans Affairs | $787,843 | |
| 4 | CSOSA | $566,095 | |
| 5 | Air Force | $143,299 | |
| 6 | Defense Health Agency | $39,010 | |
| 7 | Department of Homeland Security | $10,588 | |
| 8 | Department of the Army | $7,461 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | G004 Social Rehabilitation Services | $42,753,269 | |
| 2 | Q201 Medical – Managed Healthcare | $4,797,274 | |
| 3 | Q999 Other Medical Services | $1,392,653 | |
| 4 | G099 Other Social Services | $715,000 | |
| 5 | R499 Other Professional Services | $39,010 | |
| 6 | AN45 Health R&D Services; Health Care – Other; Expenses for R&D Facilities and Major Equipment | $7,461 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Tennessee | $11,500,342 | |
| 2 | Texas | $4,677,841 | |
| 3 | California | $3,822,915 | |
| 4 | Nebraska | $2,527,247 | |
| 5 | Wisconsin | $2,451,108 | |
| 6 | Florida | $2,183,787 | |
| 7 | Arizona | $1,934,184 | |
| 8 | Georgia | $1,306,528 | |
| 9 | Kentucky | $1,101,128 | |
| 10 | Minnesota | $967,022 | |
| 11 | Utah | $913,332 | |
| 12 | Washington | $838,667 | |
| 13 | New York | $830,258 | |
| 14 | Alabama | $821,931 | |
| 15 | Missouri | $763,475 | |
| 16 | Ohio | $722,961 | |
| 17 | North Carolina | $635,383 | |
| 18 | South Carolina | $580,742 | |
| 19 | Colorado | $573,910 | |
| 20 | District of Columbia | $566,095 | |
| 21 | Massachusetts | $527,417 | |
| 22 | Iowa | $499,378 | |
| 23 | Nevada | $490,154 | |
| 24 | Maryland | $464,120 | |
| 25 | Wyoming | $397,383 | |
| 26 | Pennsylvania | $382,033 | |
| 27 | Michigan | $361,603 | |
| 28 | Virginia | $355,308 | |
| 29 | Oklahoma | $322,358 | |
| 30 | North Dakota | $309,520 | |
| 31 | Mississippi | $295,963 | |
| 32 | New Jersey | $286,633 | |
| 33 | South Dakota | $256,449 | |
| 34 | Oregon | $251,725 | |
| 35 | Louisiana | $246,310 | |
| 36 | Illinois | $228,778 | |
| 37 | New Mexico | $224,785 | |
| 38 | Kansas | $170,757 | |
| 39 | Indiana | $163,600 | |
| 40 | West Virginia | $158,400 | |
| 41 | Puerto Rico | $129,631 | |
| 42 | New Hampshire | $110,805 | |
| 43 | Connecticut | $105,995 | |
| 44 | Montana | $104,621 | |
| 45 | Hawaii | $20,705 | |
| 46 | Maine | $19,900 |
Show all 46
Shares are of everything obligated under NAICS 621420 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 1,561 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 621420?
NAICS 621420 is Outpatient Mental Health and Substance Abuse Centers, a national industry in NAICS 62, Health Care and Social Assistance.
What is the NAICS code for outpatient treatment centers and clinics for alcoholism?
The NAICS code for outpatient treatment centers and clinics for alcoholism is 621420, Outpatient Mental Health and Substance Abuse Centers.
What is the NAICS code for psychiatric centers and clinics (except hospitals), outpatient?
The NAICS code for psychiatric centers and clinics (except hospitals), outpatient is 621420, Outpatient Mental Health and Substance Abuse Centers.
What is the NAICS code for mental health centers and clinics (except hospitals), outpatient?
The NAICS code for mental health centers and clinics (except hospitals), outpatient is 621420, Outpatient Mental Health and Substance Abuse Centers.
When did the size standard for NAICS 621420 last change?
The most recent Federal Register rule on record that names NAICS 621420 in the SBA's size standards is "Small Business Size Standards: Adjustment of Monetary-Based Size Standards, Disadvantage Thresholds, and 8(a) Eligibility Thresholds for Inflation" (87 FR 69118), published Nov 17, 2022 and effective Dec 19, 2022.
How much do federal agencies spend under NAICS 621420?
Federal contracts under NAICS 621420 obligated $51,361,354 in fiscal year 2025 and $189,033,821 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 621420?
The contractors with the most obligated under NAICS 621420 in fiscal years 2026 and 2027 are Wellpath LLC ($10,326,019); Western Alternative Corrections, Inc. ($4,686,460); and Inc. S.tacey Hoyt, Phd ($4,320,675).
Which agencies buy the most under NAICS 621420?
The agencies that obligated the most under NAICS 621420 in fiscal years 2026 and 2027 are Department of Justice ($41,326,696), Department of Health and Human Services ($6,302,168) and Department of Veterans Affairs ($787,843).
Which PSC codes are used with NAICS 621420?
The PSC codes with the most obligated under NAICS 621420 in fiscal years 2026 and 2027 are G004 Social Rehabilitation Services, Q201 Medical – Managed Healthcare and Q999 Other Medical Services.
Where is the work under NAICS 621420 performed?
By place of performance, the states with the most contract obligations under NAICS 621420 over the last 12 months are Tennessee ($11,500,342), Texas ($4,677,841) and California ($3,822,915).
What is the latest contract opportunity under NAICS 621420?
The latest contract opportunity under NAICS 621420 is CTS Mental Health and Substance Use Treatment Services in El Monte, California, solicitation from Central Office (BOP), posted October 27, 2026.
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