At a meeting earlier this week, I noticed that the physicians used the term patients, while the administration invariably referred to clients.
Patient has its roots in the Latin patiens, meaning capable of enduring.
Client is from the Latin cliens, meaning dependent, and is defined as the party for which professional services are rendered.
So the first focuses on the experience of the treated person; the second sees that person only in relation to the professional providing service.
Wouldn't you want your doctor to see you as a patient?