A health care system comprises the people, institutions, services, and resources organised to promote, restore, and maintain health. It encompasses all activities primarily focused on improving population health, organised according to established policies. Healthcare systems encompass a wide range of organisations, including primary care, speciality substance use disorder treatment services (both outpatient and residential), mental health care, infectious disease clinics, school and community health centres, hospitals, emergency departments, and other settings that deliver medical or behavioural health services.
Sources: SAMHSA_NCBI