The term PART OF HMO can be solved with the 6 letter word 'HEALTH'. HEALTH Maintenance Organizations (HMOs) are a type of managed care organization that provides comprehensive HEALTH care services to members in exchange for a fixed fee. HMOs provide a wide range of HEALTH care services, including preventive care, hospitalization, and specialty care. The term PART OF HMO refers to the HEALTH care services that are provided by an HMO.