This document defines and outlines the objectives and components of a health information management system (HIMS). A HIMS is a mechanism for collecting, processing, analyzing, and transmitting health-related information needed to organize and operate health services, conduct research, and provide training. The primary objectives of a HIMS are to provide reliable and up-to-date health information to managers at all levels, enable technical information sharing among health personnel, and provide periodic data on health service performance and trends. Key components of a HIMS include demography, health status, health resources, service utilization rates, and health outcomes. Important uses of HIMS data include measuring population health problems, facilitating health planning and management, assessing health service effectiveness and efficiency,