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, September 2 at 2:00 PM EDT

Register Free →
logo
Get CLEATUS
← 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.

1
Active Contracts
$623K
Total Obligations (12mo)
9
Awarded Contracts (12mo)
3
Contractors Awarded (12mo)
1
Median Bidders per Award
+136.2%
YoY Growth

Awarded Contractors

Companies that have received federal awards classified under NAICS 621491.

Loading
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
Federal
Emergency and Urgent Medical Response ServicesThis subcontract for Emergency and Urgent Medical Response Services is issued by the Department of Justice under the agency Fao. The primary objective of the contract is to provide immediate medical response for acute illnesses or injuries occurring within a prison facility, focusing on patient stabilization and the coordination of necessary off-site transfers. The services will be performed in Pine Knot, zip code 42635, and are classified under NAICS code 621491. The opportunity was posted on August 14, 2026, and is managed through the SAM government workspace.
Fao

POSTED

15 days ago

DEADLINE

N/A
View Details
NAICS: 621491
Closed
Federal
Health Insurance Administration and Claims ProcessingThe contract entails the comprehensive administration of health insurance services for U.S. Embassy staff, covering full hospitalization and emergency care, along with end-to-end claims adjudication, benefit fulfillment, and oversight of provider networks. All services must ensure seamless delivery of healthcare benefits to personnel stationed abroad, with strict adherence to U.S. government standards for coverage and efficiency. The subcontract is issued by the Department of State through Acquisitions - Rpso Frankfurt under NAICS code 621491, specifying the scope of work requires proven expertise in international health plan management and robust systems for processing claims and coordinating care globally. Proposals are due by August 24, 2026, with the opportunity posted on July 27, 2026, and no set-aside provisions apply. Performance is expected to support embassy personnel wherever they are stationed, requiring the contractor to maintain secure, scalable infrastructure capable of handling cross-border healthcare logistics, timely payments, and real-time provider network coordination. The contract demands a high level of reliability, compliance, and responsiveness to meet the unique healthcare needs of U.S. diplomatic staff operating in diverse and sometimes remote international locations.
Acquisitions - Rpso Frankfurt

POSTED

about 1 month ago

CLOSED

5 days ago
View Details
NAICS: 621491
Closed
Federal
Telehealth Medical ConsultationsThe contract enables secure telehealth delivery of physician and specialty consultations to support ongoing medical care for inmates at the Federal Prison Camp in Bryan, Texas. Services will be provided remotely to ensure continuity of care without requiring physical transport of inmates, maintaining both security and clinical efficiency. The offering is structured as a subcontract under a Partial Small Business Set-Aside, specifically designated for small businesses under the North American Industry Classification System code 621491, which covers outpatient care centers and other ambulatory healthcare services. The opportunity was posted on July 20, 2026, with responses due by August 4, 2026, and performance is expected to occur primarily at the Bryan facility with a zip code of 77803. The contracting agency is the Department of Justice through its FaO division, emphasizing federal correctional healthcare needs.
Fao

POSTED

about 1 month ago

CLOSED

25 days ago
View Details
NAICS: 621491
Closed
SLED
Prior Authorization and Clinical Review ServicesThe City of Houston is seeking a subcontractor for Prior Authorization and Clinical Review Services under NAICS code 621491. The primary objective of this contract is the processing and adjudication of prior authorization requests for medical services, ensuring all reviews are completed within strict mandated timeframes. Urgent requests must be processed within 24 hours, while non-urgent requests must be completed within 72 hours. The solicitation was posted on July 17, 2026, with a response deadline of August 27, 2026.
City of Houston

POSTED

about 1 month ago

CLOSED

1 day ago
View Details
NAICS: 621491
Awarded
Federal
Local Physician Services at U.S. Embassy Tallinn
Solicitation # 19EN1026C0001
The 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

about 2 months 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

2 months ago

DEADLINE

N/A
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

3 months 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

3 months ago

DEADLINE

N/A
View Details
NAICS: 621491
Closed
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

3 months ago

CLOSED

about 1 month ago
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

4 months ago

CLOSED

3 months ago
View Details
NAICS: 621491
Closed
Federal
Local Physician Services at U.S. Embassy Tallinn
Solicitation # 19EN1026Q0001
The 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

4 months ago

CLOSED

2 months 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

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 650+ contractors already using CLEATUS