NAICS Code 621491: HMO Medical Centers
National industry
SBA small business size standard: $44.5 million in average annual receipts
Definition
This U.S. industry comprises establishments with physicians and other medical staff primarily engaged in providing a range of outpatient medical services to the health maintenance organization (HMO) subscribers with a focus generally on primary health care. These establishments are owned by the HMO. Included in this industry are HMO establishments that both provide health care services and underwrite health and medical insurance policies.
Government contracts for this service: PSC Q201 Managed Healthcare Services
Code facts
- Part of
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-
62
-
621
-
6214
- 62149
-
6214
-
621
-
62
- Contract awards
- 9 In the last 12 months
- Contract obligations
- $350,242 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 621491
- Group hospitalization plans providing health care services
- Health maintenance organization (HMO) medical centers and clinics
- HMO (health maintenance organization) medical centers and clinics
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 | $0 |
| FY2026 | $830,370 |
| FY2025 | $350,242 |
| FY2024 | $234,874 |
| FY2023 | $426,617 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Specialized Medical Company | $401,753 | |
| 2 | BG Prevent GMBH | $218,137 | |
| 3 | Efficience Sante AU Travail | $204,672 | |
| 4 | Valvekliinik OU | $5,807 |
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Air Force | $619,890 | |
| 2 | Department of State | $210,480 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Q201 Medical – Managed Healthcare | $510,190 | |
| 2 | Q801 Medical Appointing Services | $204,672 | |
| 3 | Q403 Medical Evaluation and Screening Services | $115,508 |
Contract opportunities
Show all 33
Size standard history
Federal Register rules that named this code
Show all 11
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 621491?
NAICS 621491 is HMO Medical Centers, a national industry in NAICS 62, Health Care and Social Assistance.
What is the NAICS code for group hospitalization plans providing health care services?
The NAICS code for group hospitalization plans providing health care services is 621491, HMO Medical Centers.
What is the NAICS code for health maintenance organization (HMO) medical centers and clinics?
The NAICS code for health maintenance organization (HMO) medical centers and clinics is 621491, HMO Medical Centers.
What is the NAICS code for HMO (health maintenance organization) medical centers and clinics?
The NAICS code for HMO (health maintenance organization) medical centers and clinics is 621491, HMO Medical Centers.
When did the size standard for NAICS 621491 last change?
The most recent Federal Register rule on record that names NAICS 621491 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 621491?
Federal contracts under NAICS 621491 obligated $350,242 in fiscal year 2025 and $1,842,102 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 621491?
The contractors with the most obligated under NAICS 621491 in fiscal years 2026 and 2027 are Specialized Medical Company ($401,753), BG Prevent GMBH ($218,137) and Efficience Sante AU Travail ($204,672).
Which agencies buy the most under NAICS 621491?
The agencies that obligated the most under NAICS 621491 in fiscal years 2026 and 2027 are Air Force ($619,890) and Department of State ($210,480).
Which PSC codes are used with NAICS 621491?
The PSC codes with the most obligated under NAICS 621491 in fiscal years 2026 and 2027 are Q201 Medical – Managed Healthcare, Q801 Medical Appointing Services and Q403 Medical Evaluation and Screening Services.
What is the latest contract opportunity under NAICS 621491?
The latest contract opportunity under NAICS 621491 is Occupational Medicine Services for Locally Engaged Staff, solicitation from US Embassy Paris (DOS), posted September 11, 2026.
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