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NAICS Code· 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.

1
Active Contracts
$647K
Total Obligations (12mo)
11
Awarded Contracts (12mo)
3
Contractors Awarded (12mo)
+162.8%
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.

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$427K3
BAD GESUNDHEITSVORSORGE UND SICHERHEITSTECHNIK GMBH$158K7
VALVEKLIINIK OU$62K1

Top Agencies

Federal agencies directing the most contract spending toward NAICS 621491.

Department Of State4 awards$489K
Department Of Defense7 awards$158K

Related NAICS Codes

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

Family Planning Centers

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621410Same Industry GroupHigh Similarity

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621420Same Industry GroupHigh Similarity

Kidney Dialysis Centers

This U.S. industry comprises establishments with medical staff primarily engaged in providing outpat...
621492Same Industry GroupHigh Similarity

Freestanding Ambulatory Surgical and Emergency Centers

This U.S. industry comprises establishments with physicians and other medical staff primarily engage...
621493Same Industry GroupHigh Similarity

All Other Outpatient Care Centers

This U.S. industry comprises establishments with medical staff primarily engaged in providing genera...
621498Same Industry GroupHigh Similarity

Offices of Physicians (except Mental Health Specialists)

This U.S. industry comprises establishments of health practitioners having the degree of M.D. (Docto...
621111Same SubsectorMedium Similarity

Offices of Physicians, Mental Health Specialists

This U.S. industry comprises establishments of health practitioners having the degree of M.D. (Docto...
621112Same SubsectorMedium Similarity

Offices of Dentists

This industry comprises establishments of health practitioners having the degree of D.M.D. (Doctor o...
621210Same SubsectorMedium Similarity

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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
Awarded
Federal
Local Physician Services at U.S. Embassy TallinnThe contractor will deliver primary care medical physician services at the U.S. Embassy in Tallinn, Estonia, ensuring timely and comprehensive healthcare for authorized personnel. These services are provided strictly as representatives of the contractor, not as direct employees or agents of the Department of State, maintaining a clear distinction in employment and operational authority. The scope of work requires physicians to operate under the contractual terms established for medical support at the embassy, adhering to local regulations and embassy protocols while delivering clinical care tailored to the needs of the diplomatic community. This contract, identified under solicitation number 19EN1026C0001 and classified under NAICS code 621491, was awarded as a non-set-aside procurement and is managed by the U.S. Embassy Tallinn under the Department of State. The place of performance is clearly designated as Tallinn, Harjumaa, with a postal code of 15099, and the primary point of contact for inquiries is Hind Tazi, reachable via email or phone, while Katrin Lipstal serves as the procurement agent. All official communication and administrative details are coordinated from the Department of State’s office in Washington, D.C., with the contract information accessible through the designated SAM.gov portal link.
US Embassy Tallinn

POSTED

14 days ago

DEADLINE

N/A
View Details
NAICS: 621491
Federal
Community-Based Specialty Referral ServicesThe contract, titled Community-Based Specialty Referral Services, is a subcontract authorized under NAICS code 621491 for the coordination and delivery of off-site specialty medical care including radiology, surgery, and cardiology through community-based providers under referral or contractual arrangements. The services are to be performed at a place of performance located in Atwater, California, with a zip code of 95301, and are intended to ensure timely and accessible specialty care for beneficiaries through external healthcare networks. The contract was posted on June 17, 2026, and is managed by the Department of Justice through its agency designation FAO, though no specific office address or point of contact is provided. The nature of the subcontract does not include a set-aside designation, indicating it is open to all eligible contractors without preference for small business or other categories. The contract’s operational focus is on integrating specialty care services into community health systems to enhance care continuity and efficiency without direct facility ownership or in-house provision.
Fao

POSTED

28 days ago

DEADLINE

N/A
View Details
NAICS: 621491
Federal
USMTM Community ClinicThe 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

about 1 month ago

DEADLINE

N/A
View Details
NAICS: 621491
Federal
Pharmacist Services for U.S. Military ClinicThe contract entails providing a full-time equivalent pharmacist to oversee prescription dispensing, medication safety, and drug interaction reviews at the USMTM Community Clinic located in Riyadh. The pharmacist will also be responsible for managing overall pharmacy operations while coordinating with U.S. military health systems and TRICARE pharmacy networks to ensure seamless integration and support for military personnel's healthcare needs. This subcontract, administered by the Department of Defense under the NAICS code 621491, focuses on delivering specialized pharmaceutical services within a military healthcare setting. The role requires expertise in clinical pharmacy practices and familiarity with military healthcare protocols to maintain the highest standards of medication safety and effectiveness. This contract emphasizes collaboration with multiple military health entities, ensuring comprehensive pharmacy management consistent with the standards of the U.S. military healthcare system. The effort supports critical mission functions by enhancing the quality and efficiency of pharmaceutical care provided to service members stationed at the Riyadh community clinic.
FA4885 Hq Usmtm Lgc

POSTED

about 1 month ago

DEADLINE

N/A
View Details
NAICS: 621491
Federal
Core Health Insurance Administration & Claims ProcessingThe contract involves comprehensive management of health insurance services for U.S. Embassy personnel and their dependents located in Nigeria. It covers the full spectrum of administration including enrollment, claims processing, provider network management, customer service, and ensuring compliance with reporting requirements. The scope is designed to support efficient health insurance operations tailored specifically for embassy staff needs. Issued by the U.S. Embassy in Abuja under the Department of State, this subcontract falls within the health care and social assistance sector, identified by the NAICS code 621491. The contract was posted on June 1, 2026, with a response deadline of July 15, 2026. The place of performance is set in Abuja, Nigeria, and the opportunity emphasizes delivering seamless health insurance services that meet the regulatory and operational standards for U.S. government personnel stationed abroad.
US Embassy Abuja

POSTED

about 1 month ago

DEADLINE

in about 16 hours
View Details
NAICS: 621491
Closed
SLED
Health Insurance Network Provider ManagementThe contract involves managing and maintaining a network of healthcare providers across Georgia to ensure comprehensive access for Medicare Advantage retirees. This includes coordinating with physicians, hospitals, and clinics to maintain quality care standards and timely availability of services for enrolled beneficiaries. The scope requires ongoing provider engagement, credentialing, network adequacy monitoring, and compliance with Medicare Advantage regulations to support consistent healthcare access throughout the state. The contract is classified as a subcontract under NAICS code 621491, indicating it relates to other ambulatory health care services. It is issued by Gwinnett County Government under the Georgia state agency structure, with a response deadline of June 8, 2026, and a posting date of May 6, 2026. While the physical place of performance and point of contact details are unspecified, the work is geographically focused within Georgia, and the entity responsible for managing the network must demonstrate the capability to sustain a robust, geographically diverse provider base to meet the needs of a retiree population covered under Medicare Advantage plans.
Gwinnett County Government

POSTED

2 months ago

CLOSED

about 1 month ago
View Details
NAICS: 621491
Closed
Federal
Local Physician Services at U.S. Embassy TallinnThe contractor will provide primary care medical services to the U.S. Embassy community in Tallinn, Estonia, under a firm-fixed-price arrangement with a one-year base period and two one-year option periods, potentially extending the contract to three years. The physician, acting as a representative of the contractor and not as a Department of State employee, must be available for scheduled patient appointments every Monday and Thursday from 2:00 PM to 4:00 PM, totaling four hours per week, with flexibility in scheduling as long as the weekly total is maintained. Services include conducting patient examinations for medical clearances and driver evaluations, prescribing both regular and controlled medications, managing acute and chronic illnesses, providing emergency phone coverage on days when not physically present at the Embassy, and coordinating patient care with the Embassy’s Registered Nurse, Regional Medical Officer, and other MED personnel. All patient encounters must be documented in a separate medical record maintained by the contractor, with copies provided to the Embassy’s Health Unit for inclusion in the official MED record; direct documentation into MED systems is prohibited unless explicitly authorized. The contractor must ensure all personnel are fluent in English and Estonian, licensed to practice medicine in Estonia, and possess access to local health databases. The contractor is responsible for complying with Estonian laws, obtaining all required local licenses and permits, and maintaining strict security protocols, including receiving, securing, and accounting for all Embassy keys without duplication without prior approval. Personnel must verbally identify as non-federal employees and include disclaimers in email signatures, and may not use the Department of State logo. Background investigations are required for all staff, with an estimated processing time of 30 to 60 days, and submissions must include completed OF-174 forms. All documentation, reports, and materials generated under this contract become the exclusive property of the U.S. Government and must be delivered upon completion or termination. The contractor must indemnify the U.S. Government against any claims of patent, trademark, or copyright infringement. Invoicing must be submitted electronically to TallinnInvoices@state.gov, with electronic funds transfer required for payment, and all proposals must be submitted by the deadline via email in PDF, DOCX, or XLSX formats, not exceeding 30 MB per file. The contractor must maintain a satisfactory record of integrity, possess adequate financial resources and operational capacity, and be registered in SAM with a valid UEI; evaluation for award will be based on the most advantageous offer, considering both price and non-price factors.
US Embassy Tallinn

POSTED

2 months ago

CLOSED

23 days ago
View Details
NAICS: 621491
Federal
Onsite Optician Fitting ServicesThis contract involves the provision of onsite optician fitting services for prescription eyeglasses by licensed opticians at various Veterans Affairs medical facilities within VISN 8. It is set as a subcontract specifically reserved for Service-Disabled Veteran-Owned Small Businesses, emphasizing support for veteran entrepreneurs in the optical healthcare sector. The service is aimed at ensuring accurate and professional fitting of eyeglasses directly at the medical sites, enhancing convenience and accessibility for veterans requiring vision care. Managed by the Department of Veterans Affairs through the NETWORK Contract Office 8, this contract falls under the NAICS code 621491, which pertains to ophthalmic goods stores or related optical services. Although specific facility locations and point of contact details are not provided, the contract underscores a commitment to high-quality, in-person optical services within the VA healthcare system, supporting veterans’ vision health through specialized, localized care.
248-NETWORK Contract Office 8 (36C248)

POSTED

2 months ago

DEADLINE

N/A
View Details
NAICS: 621491
Closed
Canada
Urinalysis Collection - TimminsThis contract, issued by the Correctional Service of Canada for Urinalysis Collection Services in Timmins, Ontario, and its surrounding areas, specifies the requirements for providing urine sample collection from federally released male and female offenders under strict procedural and security protocols. The services must be performed during regular business hours of 0700 to 1800 Monday to Friday, with the contractor obligated to respond to emergency requests within three to four hours and non-urgent requests within 24 hours. Each sample collection must be conducted by a collector of the same gender as the offender, with complete adherence to the Correctional Service Canada’s CD 566/566-11 regulations, including accurate labeling, chain-of-custody documentation via Form 1065, use of protective gloves, proper storage, and shipment to an approved laboratory with accompanying bill of lading. The contractor must also provide backup personnel approved by CSC, ensure all collectors complete the mandatory Urinalysis Collectors Orientation Program at the contractor’s expense, and maintain continuous compliance with security requirements including Reliability Status clearances for all staff. Travel reimbursement is limited to collections outside Timmins and its five wards, with travel time compensated at the hourly rate, but no payment is allowed for intra-city travel. No-show fees may be claimed up to three hours at the firm hourly rate if an offender fails to appear for a scheduled single collection, and cancellation fees apply when CSC provides less than 24 hours notice. The solicitation is open exclusively to Canadian suppliers under the Reciprocal Procurement Policy and is not subject to any trade agreements or set-asides for Indigenous businesses. Award will be made to the lowest-priced technically acceptable bid after rigorous evaluation of three mandatory technical criteria: provider mobility demonstrated by a valid driver’s license, availability of both male and female collectors, and at least one year of relevant experience in correctional or treatment environments within the last five years, supported by CVs and verifiable references. Failure to satisfy any single criterion renders a bid non-responsive. The contract runs from award through March 31, 2029, with an estimated value of $24,000. All work must be conducted in English, and the contractor must provide all required documentation, including monthly logs and invoices, to the designated Parole Office in Barrie. Security requirements are stringent, mandating compliance with the Contract Security Manual and Security Requirements Checklist, prohibiting removal of protected information from designated sites, and requiring prior written approval for any subcontract
Correctional Service of Canada

POSTED

3 months ago

CLOSED

3 months ago
View Details
NAICS: 621491
Closed
SLED
Healthcare Claims Administration & Eligibility VerificationJackson County in Florida is seeking a subcontractor to provide comprehensive end-to-end administration of medical and dental claims, encompassing eligibility verification, benefit coordination, provider payments, and member communications. The contract requires a robust system capable of accurately processing claims, verifying member coverage in real time, coordinating benefits across multiple plans, ensuring timely and correct payments to providers, and maintaining clear, compliant communication with plan members. The work must be performed at the designated place of performance in Marianna, Florida, with all operations aligned to meet the agency’s service standards and regulatory expectations. Interested parties must submit responses by the deadline of June 4, 2026, and the solicitation falls under NAICS code 621491 for other medical and dental services. The contract type is classified as a subcontract, and there is no set-aside designation specified.
Jackson County

POSTED

3 months ago

CLOSED

about 1 month ago
View Details
NAICS: 621491
Closed
SLED
Pharmaceutical Claims Processing & Drug Formulary ManagementJackson County is seeking a subcontractor to administer and process prescription drug claims with a focus on adjudication, formulary compliance, and pricing verification for specific medications including JARDIANCE, ELIQUIS, and CIMZIA. The contract falls under NAICS code 621491 and is open for response until June 4, 2026, with proposals due by 7:00 PM Eastern Time. The work is to be performed at a designated place of performance in Marianna, Florida, with a zip code of 32448. This is a subcontracting opportunity under the employee health plan for Jackson County, and the solicitation was posted on April 23, 2026. No set-aside classification is specified. Interested parties can access the solicitation details through the provided online link.
Jackson County

POSTED

3 months ago

CLOSED

about 1 month ago
View Details
NAICS: 621491
Closed
SLED
FSA/HRA Account AdministrationJackson County is seeking a subcontractor to administer Flexible Spending Accounts and Health Reimbursement Arrangements, encompassing full lifecycle management including employee enrollment, claims evaluation, timely disbursements, and compliance with IRS reporting requirements. The contract pertains to the management of employee health plans and requires expertise in navigating federal regulations, ensuring accuracy in benefit processing, and maintaining secure and timely communication with participants. Performance is expected to be centered in Marianna, Florida, with a response deadline of June 4, 2026, and the opportunity is classified under NAICS code 621491 for other medical and dental offices. The solicitation is open to qualified vendors capable of delivering comprehensive administrative services with a focus on compliance, efficiency, and participant support.
Jackson County

POSTED

3 months ago

CLOSED

about 1 month ago
View Details

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