Imagine needing to hire an associate therapist and that there are 2 identical, in all aspects of performance, save a visible tatoo job candidates applying for a position. Do you think it would be in the interest of the practice owner to risk having your tattoo potentially offend some of his/her clients? Or do you think there is some population of all practices patients which feel that more confident in the hands of a tatooed therapist? If it is something very important to you, I would highly recommend you put it in a place less visable. Hope that helps.