It really depends on the position you hold, the work you will be doing and the requirement of the department. In recent years, as a profession, we have been trying to get out of the basement or maintenance mentality and are becoming more respected by hospital management in general. I've worked mostly in rural locations on the East coast from VA to Northern NY as a single shop technician. I chose to dress with a shirt and tie (ensuring to secure the tie if I was in a situation where this would become a hazard) due to frequent interactions with hospital administrators. I also served in larger hospitals in Philadelphia, PA and Fargo, ND in supervisory/manager roles where it became required to wear a suit and tie on regular occassions for meetings.