All pastors check in at the nurse’s station. None that I know of have ever visited the locked psych wards.
That may be a bit different then by region, as most Pastors here just check in with the front desk and not necessarily with the actual nurses station on the floor. As for the psych wards, I've got no clue on that one as I've not had any experience with them at all. I've heard that they do visit, but I don't know for certain.
All hospital related chaplains get a list daily who is of their faith and go directly to them. All private ministers - the patients own minister - goes in like any family member unless it’s critical care - then they check in with the clerk at the front desk in the main lobby - as only a limited amount of people are allowed in that section and the family makes sure he is accommodated with an opening to the patient.