Fun is part of it
Jantz sees music itself as having an intrinsic therapeutic value, in addition to the positive experience that a person can have with a music therapist. For children in particular, it can encourage them to learn a new skill; sometimes patients who stay at Boston Children's Hospital for longer periods get good at guitar.
Occasionally Jantz has to dress in a surgical gown and gloves, but for the most part the kids don't view what he does as a therapy -- they're just relieved that instead of poking and prodding, he's there to play music with them.
"There's nothing wrong with having fun," he said. "That's part of how it works."
He's prepared for a full repertoire of traditional children's songs, but he has also worked with young kids who love The Beatles. And some teens would rather hear music from their earlier childhood than Justin Bieber.
The phone that pages him, though, doesn't beep or ring to alert him to his next destination.
It vibrates, so as to not interrupt the music.