Welcome back!
I'd be pizzed off too. I work on a hospital campus, they encourage bike riding. We even have a shiny new rack outside my office. Certified full time bike commuters have the option of using special bike lockers.
I've also had to deal with overly puffed up hospital security guards. Thankfully the really arrogant ones have been let go, only the good guys remain. I'd raise polite hell with the hospital admins.