So there are multiple things to consider for carrying as a health care worker:
Legalities aside (generally it is illegal in my state, although there are "exceptions"), the biggest issue is clothing. My case for example; I am whats considered a large burly man. I wear carhartt scrubs for the material as well as the belt loops are actually functional. Using an atlas g-hook belt is no problem and more than adequate for me to carry my 509 and a spare mag in JMCK hardware. Thats OUTSIDE the hospital (as in to and from). Now, the biggest reasoning for this is that scrub tops shrink in length. Anyone who wears them regularly enough to wash them constantly knows this sad fact. Its never a huge amount, but my longest top now has the hem riding a half inch below my belt line. I dont have any worries with this outside of the hospital, but there is no way that would fly in my unit. Im around 50 some odd nurses each shift, it would get spotted for sure. Maybe not the whole holster, but the loops for sure would.
The second biggest issue is job requirements. I am in direct contact with co-workers and patient constantly. Much more so than I ever would be out and about as joe shmo. There is a huge chance that even AIWB I would end up rubbing, bumping, or pushing against someone with my carry. Its just a fact. Especially in code environments. Which brings me to my next point, say all is well and you have no issues with clothing or contact but you go to a code. That code then has you transporting your patient to MRI. You cant exactly get down to the MRI room and say, "hey wait, let me drop this right here with my badge and pen!" (for those that dont know, the MRI machine is essentially one giant magnet that is powerful enough to attract even small metal objects with such force they become lethal projectiles; therefore only approved metals are allowed past a certain point and anything else is left outside the room.) You also cant duck out and stow it in a bathroom or anything, thus leaving your carry unattended in a public restroom.
My hospital does not allow carry. The status quo is the only legal option is for it to be left in the car. I will not disclose on here my method, but suffice to say it is not left in the car. You are welcome to PM me for that info though.