Health care or healthcare is the treatment and prevention of illness. Health care is delivered by professionals in medicine, dentistry, nursing, pharmacy and allied health.

The social and political issue of access to healthcare in the US has led to public debate and confusing use of terms such as health care (medical management of illness), health insurance (reimbursement of health care costs), and the public health (the collective state and range of health in a population). The term health care industry is not often used as described in this lemma, outside the USA.