I haven't seen a nurse in "Nursing Whites" since the early 1980's. Navy nurses, who were officers, used to wear them and the number of stripe on their caps corresponded to their rank. (I stripe = Ensign, 1 1/2 stripes = LTjg, 2 stripes = LT., etc) Female Corpsmen at one time wore nurses whites in hospitals without caps, and their rank and a caduceus on their collars. Some time later, both nurses and corpsmen would wear either regular working uniforms or scrubs.
Of curse, in the civillian world, everyone wears scrubs now.