As an experienced professional I want to give a warning against getting or showing any tattoos.
It is 100% legal to discriminate against people with tattoos. Currently there are lawsuits in the works in the area of religious tattoos but so far the courts have not overruled previous decisions.
For first responders, your employer can require you to list ALL scars or tattoos. It is a felony to lie. Often times for fire fighters they use a polygraph during the interview. In the extreme case of some city fire fighters they have a "swim test" where the point is not to test your swimming ability but to see if you have a disqualifying tattoo.
Having a tattoo is more than a form of self expression, their meanings go back much longer. The word "stigma" has the Latin base of tattoo or to permanently stain. Only slaves or known criminals had tattoos and where given tattoos against their will. In todays society a majority of people do associate tattoos with criminal behavior and social deviance. It is a legitimate fear of a patient of contracting hep C from a worker.
Having a visible tattoo can and will probably preclude you from achieving your potential as far as you career goes. So to all you in the lower echelons of nursing with visible arm/neck tattoos who dream of achieving more

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My advice is to not get any. If you all ready have them, hide them and lie about them.