Any service that can contribute to improved health or the diagnosis, treatment, and rehabilitation of sick people; it is not necessarily limited to medical or health-care services.
Health services are often formally organized as a system of established institutions and organizations to supply services to respond to the needs and demands of the population within a defined financial and regulatory framework.
Health services can include health education, health promotion, and environmental services, such as housing, sanitation, etc., which have a known health benefit.