What role would a rabbi have in a hospital?

A rabbi's roles in a hospital would include: -- simply visiting and chatting with the patient ... a significant Torah commandment; (see Genesis, Chap. 18, from Verse 1. Abraham, though ill, watches the road, in order to fulfill the commandment of welcoming travelers, whereas the three travelers, sent by heaven, zero in on Abraham's home, in order to demonstrate the commandment of visiting the sick.) -- advocating for the patient to the hospital staff, where Jewish law might enter into care or treatment; for example: procuring kosher food for the patient; -- be available and present with a dying patient in the last moments, then see to it that the remains are cared for in accordance with Jewish law; -- be available as a resource for comfort and guidance to the family of the patient, whether living or deceased.