NAICS 621491: HMO Medical Centers
HMO Medical Centers is NAICS code 621491. A business is small under it with $44.5 million or less in average annual receipts. 1 federal contract is open on SAM.gov under this code right now.
- SBA size standard
- $44.5 million or less in average annual receipts
- Open contracts now
- 1
- Federal spending, FY2025
- $350,242
- Share won by small businesses
- 0%
- Small businesses registered
- 184
Open federal contracts for hmo medical centers
- Occupational Medicine Services for Locally Engaged Staff
✦ The U.S. Embassy in Paris plans to buy occupational medical services for its locally engaged (local hire) employees in Paris, France.
Due in 9 daysOct 15, 2026
What NAICS 621491 covers
The Census Bureau's NAICS index lists these kinds of work under 621491:
- Group hospitalization plans providing health care services
- Health maintenance organization (HMO) medical centers and clinics
- HMO (health maintenance organization) medical centers and clinics
Read the full definition, including what's excluded, on census.gov.
SBA size standard for 621491
To count as a small business for a contract assigned NAICS 621491, your business must have $44.5 million or less in average annual receipts. Receipts are averaged over your last five completed fiscal years.
From SBA's table of size standards, effective Mar 17, 2023. Confirm it with SBA's size standards tool before you certify your size.
Who buys hmo medical centers
Agencies that awarded the most under NAICS 621491 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Department of the Air Force | $983,931 |
| Department of State | $484,327 |
Open notices right now come from Department of State (1).
Set-asides on open 621491 contracts
- No set-aside (full and open): 1
Not sure which set-asides you qualify for? Try the free SBA certification screener, or read set-aside contracts, explained.
Your competition
184 businesses with active SAM.gov registrations are rated small under NAICS 621491, most of them in Texas (23), Florida (21), Georgia (18), Virginia (16) and Maryland (12). Look any of them up with the free CAGE code and UEI lookup.
Federal spending under 621491 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $234,874 |
| FY2025 | $350,242 |
| FY2026 | $883,143 |
| FY2027 (so far) | $0 |
Source: USAspending.gov, all contract awards with this NAICS code. Fiscal years start October 1.
Related NAICS codes
- 621410 Family Planning Centers
- 621420 Outpatient Mental Health and Substance Abuse Centers
- 621492 Kidney Dialysis Centers
- 621493 Freestanding Ambulatory Surgical and Emergency Centers
- 621498 All Other Outpatient Care Centers
Frequently asked questions
What is NAICS code 621491?
621491 is the 2022 NAICS code for HMO Medical Centers. The Census Bureau's index lists work such as group hospitalization plans providing health care services, health maintenance organization (hmo) medical centers and clinics, hmo (health maintenance organization) medical centers and clinics under it. Federal contracting uses the 2022 codes.
What is the SBA size standard for NAICS 621491?
$44.5 million or less in average annual receipts. A business at or under that is small for contracts assigned this code. The current SBA table took effect Mar 17, 2023.
Are there government contracts for hmo medical centers?
Yes. 1 federal contract opportunities under NAICS 621491 are open on SAM.gov right now. Agencies obligated about $350,242 under this code in fiscal year 2025, according to USAspending.gov.
How do I add NAICS code 621491 to my SAM.gov registration?
Update your entity registration on SAM.gov and add the code on the Goods and Services page, in the Assertions section. You can list several NAICS codes and mark one as your primary. Changes are free.
Keep going
- Search other NAICS codes by keyword or company
- How to choose NAICS codes for government contracts
- NAICS codes with the most open federal contracts
FedReady is an independent company, not affiliated with SBA, SAM.gov, the Census Bureau or any government agency. Open-contract counts come from SAM.gov and update daily; spending figures come from USAspending.gov.