I can't find a clear answer for my question.. The PHB said regarding OAs:
The opportunity attack action is provoked by an enemy leaving an adjacent square without shifting or teleporting, or by an adjacent enemy using a ranged or area power. [PH:290]
With that in mind, I'm wondering if a healing spell, like Inspiring Word, is counted as a area power?
Encounter (Special) ✦ martial, healing
Close burst 5
So, considering that a close burst is an area power, if a player tries to heal someone, would he provoke OAs?