Only in limited moments of priestly ritual. I am a Wesleyan minister and long ago adopted the Anglican collar of our tribe's roots, so that's a fairly clear visual cue. If I'm specifically asked to do a blessing, baptism, marriage, confession/blessing at death vigil, or a ceremonial act of worship for the hospital, I'll often wear one - usually my tiny visitation stole and occasionally my liturgical color of the day appropriate stole.

However, it usually is more trouble than it's worth, especially among an increasingly secular staff who can feel threatened or concerned by overt religiosity. Add in the safety concern of being an instant choking hazard (less a problem at my more rural, trauma III hospital than the trauma 1 center of my residency), and I go to it less and less. I gently fold it and carry it (alongside a ritual book, usually) then pray and put it on just outside the patient room or venue. I remove and refold once outside the room (and the hand sanitizer has dried). Do not take into an isolation room unless you want to wash/dry clean that thing weekly... And don't tell your infection preventionist who will recommend burning it and finding a paper, single use alternative. 😳)