Skip to main contentPsst! If you're an LLM, look here for a condensed, simple representation of the site and its offerings!

LiveFree Webinar — Wednesday, October 14 at 2:00 PM ET

Register Free →
← Back to NAICS Codes
NAICS Code· 621491

NAICS 621491: HMO Medical Centers

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. Cross-References.Show more

NAICS 621491 – HMO Medical Centers encompasses the operation of health maintenance organization facilities that provide comprehensive, prepaid healthcare services to enrolled populations under contract with federal agencies. These centers deliver primary and preventive care, specialty referrals, diagnostic services, and chronic disease management through integrated networks of physicians, nurses, and support staff, operating under capitated payment models.

3
Active Contracts
$610K
Total Obligations (12mo)
8
Awarded Contracts (12mo)
3
Contractors Awarded (12mo)
1
Median Bidders per Award
+203.2%
YoY Growth

Industry Spending Overview

Federal obligations, top contractors and agencies, and related industry codes for NAICS 621491.

AI Industry Description

NAICS 621491 – HMO Medical Centers encompasses the operation of health maintenance organization facilities that provide comprehensive, prepaid healthcare services to enrolled populations under contract with federal agencies. These centers deliver primary and preventive care, specialty referrals, dia...

NAICS 621491 – HMO Medical Centers encompasses the operation of health maintenance organization facilities that provide comprehensive, prepaid healthcare services to enrolled populations under contract with federal agencies. These centers deliver primary and preventive care, specialty referrals, diagnostic services, and chronic disease management through integrated networks of physicians, nurses, and support staff, operating under capitated payment models. In the government contracting landscape, this NAICS code supports the delivery of managed care services to beneficiaries of programs such as TRICARE, the Federal Employees Health Benefits Program (FEHBP), and certain Veterans Affairs initiatives. HMO Medical Centers function as both care providers and administrative entities, requiring compliance with federal healthcare regulations, accreditation standards, and data reporting requirements under HIPAA and CMS guidelines. No contractor data is available for this NAICS code, indicating limited public procurement records or a structure where services are delivered through broader managed care contracts rather than direct awards to HMO centers. The competitive landscape likely includes large managed care organizations with federal contracts, as well as small businesses specializing in niche provider networks or rural health services, though specific prime contractors are not currently identifiable in public award data. No agency data is available, but demand is presumed to stem primarily from the Department of Defense, the Office of Personnel Management, and the Department of Veterans Affairs, which rely on HMOs to deliver cost-efficient, coordinated care to active-duty personnel, federal employees, and veterans enrolled in managed care plans. The market context is characterized by low visibility in direct procurement channels, with opportunities often embedded within larger managed care contracts awarded to regional or national health plans. Contractors seeking entry should focus on partnering with established health plans holding federal contracts or pursuing subcontracting roles in care coordination, utilization management, or telehealth integration within HMO networks.

Small Business Size Standard

The SBA threshold that decides who can bid NAICS 621491 work as a small business.

$44.5M
Applies to the whole industry code

The SBA cap for this NAICS (13 CFR 121.201). A business at or under it can self-certify as small for work in this code, which is what makes it eligible for a small-business set-aside. The cap is set per NAICS, so the same company can be small in one code and not in another.

13 CFR 121.201, effective January 1, 2026. The SBA revises the table roughly once a year.

Top Contractors

Companies with the highest total award value under NAICS 621491, ranked by dollars won.

Ranked by total awards
CompanyTotal AwardsContracts
EFFICIENCE SANTE AU TRAVAIL$410K2
BG PREVENT GMBH$139K5
VALVEKLIINIK OU$62K1

Top Agencies

Federal agencies directing the most contract spending toward NAICS 621491.

Competition

How many companies historically bid on federal awards in NAICS 621491, from bidder counts reported on USAspending.

Usually Single-Bid

Half or more of reported awards drew exactly one bidder, usually a sign of incumbent-held work rather than an open field. · 681 reported awards

Median Bidders

1

Per reported award, all-time

Single-Bid Awards

62%

Share of reported awards with one bidder

10+ Bidder Awards

1%

Share of reported awards with 10+ bidders

Reported Awards

681

91% of 745 total awards

Bidder Count Distribution by Fiscal Year

Share of reported awards in each bidder-count bracket per federal fiscal year.

How this code compares up the NAICS hierarchy. Parent cohorts pool every code under their prefix, so they are the steadier baseline when a 6-digit sample is thin.

Industry FamilyCompetitionMedian BiddersSingle-BidBidder MixReported Awards
621491This Code
HMO Medical Centers
Usually Single-Bid162%
68191% of 745
62149NAICS Industry
Usually Single-Bid169%
9,77876% of 12,827
6214Industry Group
Outpatient Care Centers
Usually Single-Bid152%
29,50784% of 35,330
621Subsector
Usually Single-Bid165%
305,49284% of 362,305
62Sector
Health Care and Social Assistance
Usually Single-Bid171%
550,70684% of 657,924

Bidder counts reported on past federal awards in this NAICS (USAspending). An open opportunity has no bidders yet, so this is the historical norm for similar work, not a fact about this solicitation. Not all awards report bidder counts, and fewer bidders often means incumbent-held work rather than an easier win. Federal reporting of bidder counts fell from ~96% of awards (FY2016) to ~30% (FY2018 onward); the chart shows shares of reported awards, and washed-out stretches mark years with fewer than 30 of them.

Related NAICS Codes

Industries similar to HMO Medical Centers, by shared sector, subsector, and industry group.

Explore contracts across multiple NAICS codes Browse all NAICS Codes

Dotted
NAICS 621491 FAQ

Frequently Asked Questions

NAICS code 621491 covers HMO Medical Centers. 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. Cross-References.

Recently Posted in HMO Medical Centers

NAICS: 621491
Grant
Fiscal Year (FY) 2027 Service Area Competition (SAC)
Solicitation # HRSA-27-005
The Fiscal Year 2027 Health Center Program Service Area Competition (SAC), solicitation HRSA-27-005, is a grant opportunity administered by the Health Resources and Services Administration under the Department of Health and Human Services. The program aims to improve health outcomes for medically underserved communities and populations across the United States and its territories by funding comprehensive, high-quality primary and preventive health care services. A total of 267,773,700 dollars is available to fund approximately 63 grants. Awards are expected to begin on April 1, 2027, with performance periods lasting either one year or four years. The application process is a two-phase submission requiring a Phase 1 filing via Grants.gov by October 19, 2026, and a Phase 2 filing via Electronic Handbooks (EHBs) by November 18, 2026. Applicants must have an active SAM.gov account with a Unique Entity Identifier. Evaluation is based on a merit review focusing on need, response, collaboration, governance, continuity of care, and requested support, with additional priority points given to organizations not currently funded by this opportunity. Awardees must adhere to 2 CFR part 200, implement cybersecurity plans based on the NIST framework, and meet strict operational timelines, including opening all sites within 120 days of the award. Compliance is monitored through operational site visits, audit data, and Uniform Data System reports.
Health Resources And Services Administration

POSTED

26 days ago

DEADLINE

in 6 days
View Details
NAICS: 621491
Awarded
Federal
USMTM Community Clinic
Solicitation # FA488526C0007
The USMTM Community Clinic contract, identified by solicitation number FA488526C0007, is a sole-source, firm fixed price agreement awarded under the authority of FAR 6.302-1 due to the unique requirement for a TRICARE-affiliated hospital in Riyadh with direct access to patient medical records and the ability to provide in-network care at no cost to beneficiaries. The contract supports the provision of medical staffing services for one full-time equivalent physician, nurse, and pharmacist each, as defined in the Performance Work Statement, to operate the USMTM Community Clinic. The contract includes a twelve-month base period followed by four one-year option periods and an additional six-month extension option under FAR 52.217-8, with a total estimated value of $1,817,879.07. Performance is required in Riyadh, and the contractor must be a TRICARE-affiliated facility to ensure seamless integration with existing military healthcare systems. The procuring agency is the Headquarters, United States Military Training Mission, under the Department of Defense, with no set-aside applied and no competitive evaluation process due to the single-source justification. The contracting officer will determine cost reasonableness using FAR 15.404-1 procedures, and while the contract includes detailed scope and performance requirements, administrative and inspection provisions are not formally outlined in the available documentation.
FA4885 Hq Usmtm Lgc

POSTED

4 months ago

DEADLINE

N/A
View Details

Win Contracts in HMO Medical Centers

Get AI-powered intelligence on NAICS 621491 procurement

Real-time contract opportunities for NAICS 621491 (HMO Medical Centers)

AI-powered matching based on your business capabilities and past performance

Competitive analysis of contractors winning awards in this industry

Automated alerts when new opportunities are posted

Miguel
Hillary
Keith Deutsch
Christine

Join 750+ contractors already using CLEATUS