NAICS UNIVERSITY · Free research for insurance agents

HMO Medical Centers

NAICS 621491 · United States · 2022 edition

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.

UW takeaway · AI logic + saved research

Start with the work promised to the client.

For HMO Medical Centers, clarify the services, contracts and consequences of an error. Review medical professional liability, managed care liability, insurance regulatory liability. Confirm which professional activities and additional services the proposed coverage actually addresses.

Questions to ask

  1. Does this HMO establishment also underwrite health insurance policies, or is it purely a care-delivery operation?
  2. What is the approximate enrolled subscriber count and patient visit volume annually?
  3. How many employed or contracted physicians and mid-level providers are credentialed at this location?
  4. Are any specialty services — urgent care, behavioral health, minor procedures, or imaging — performed on-site?
  5. What does the utilization review and prior authorization process look like, and is it handled in-house or by a third party?
  6. What is the prior malpractice and managed care claims history, including any open claims?
  7. Has the organization been subject to any state insurance department or CMS regulatory actions in recent years?
  8. What is the current state of HIPAA compliance documentation and cybersecurity controls, particularly regarding the subscriber and patient record database?

Activities described by this code

Other activities to examine

Census classification reference

For educational purposes only. AI-generated insurance research and automated logic can contain errors. Independently verify classification and coverage decisions.

Compare another operation

Insurance operations research — draft

HMO medical centers are outpatient facilities owned by a health maintenance organization that provide primary and preventive care — including physician visits, routine diagnostics, immunizations, chronic disease management, and referral coordination — exclusively or primarily to enrolled HMO subscribers. Some establishments also perform the insurance underwriting function, collecting premiums and managing covered benefits, which creates a dual clinical-and-financial services profile unusual in standard outpatient care.

Questions to investigate

This insurance research was generated in April 2026. It has not received a complete human review. The October 12, 2026 audit checked codes and titles only, not descriptions or coverage assertions.

Classification workflow · Multiple-operation workflow