Patient service associates are widely known as Patient care assistants, but some companies also call them patient care associates or patient support agents. The job of a patient care assistant is to provide the best possible customer service to their customers that include answering questions about treatment and diagnosis, making appointments, giving medication and supplying any other necessary supplies.Its important for a patient care assistant to make patients feel comfortable during the visit. A nurse or doctor may give instructions on certain things that must be done at home depending on the reason of the health issue.