So, an action by itself is not assault, but if you do the same action but make sure it doesn't hurt the patient, it is assault?
Well, some people are unwise enough to visit psychics, shamans and witch doctors instead of actual medicine doctors; I guess this law is supposed to make life harder for self-trained surgeon wannabes.
http://www.theverge.com/2012/8/8/3177438/cyborg-america-biohackers-grinders-body-hackers