I don't see aproblem with it. Just remember, it will put the healer on top of the "take down" list next to the mentalist.
Also, in the minds of the public, if a character can heal in combat, obviously he can heal out of combat also. "Mr. hero, I have this terrible bunjun." " My wife is dying of cancer, could help her?"
"My dughter..." "I..." "could you help..."
The hero would be as overwhelm as Jesus was if his healing powers were confirmed. People would be flocking to him expecting miracles. Then there are those who will try and prove him a fraud, or attack him for various reasons.
All in all, it might help in combat, but it would be a pain outside of it so he probably wouldn't do it very often.
(I'm just reminded of the scene in the Matrix Reloaded, where Neo steps off the elevator and all those people are waiting for him.I'm glad I'm not in his shoes.
TimS.