Q: Is there a code that says anything about adding a vent through a door that is in the corridor of our hospital?
A: Well… you might be able to do that legally on a very few specific corridor doors (i.e. bathroom doors, toilet rooms doors, shower room doors), but no, you cannot install a louver in a typical corridor door in a hospital because section 18.104.22.168.1 of the 2012 LSC says corridor doors have to resist the passage of smoke. Therefore, a louver in a door would not resist the passage of smoke.
Now, a very few specific corridor doors do not have to resist the passage of smoke as described in section 22.214.171.124.2 (1), and you would be permitted to install a louver in those doors.