Maybe psychology over physiology, not sure which would be better. There is a national organization for music therapy, don’t remember the name but you could google it. That should explain requirements to get certified. As I recall from hearing about therapy when my kids were sitting through info sessions for other music degrees, music therapy requires some clinical work. Not sure whether that is possible without a specific therapy degree, but again that national org site could tell you.
Don’t know anything about the schools listed, but I know here in Ohio people often go to Baldwin Wallace for music therapy degree. Probably other schools as well, I’m just not as up to speed on that.