Question About Kaiser Hospital Job

I was searching job postings on Kaiser's website and there were positions in the Patient Care Services department. Does this mean, it is a position in any of the units/departments, because don't all units provide patient care? I'm not familiar with Kaiser. If this is it's own separate dept., can someone explain the unit a little and what the nurses do in this dept.? Probably is a stupid question, but I have no idea. I thought the would put med-surg, ER, etc for dept. Thanks.