▁ ▁Information ▁provided ▁ ▁In ▁addition ▁to ▁mention ▁of ▁the ▁relevant ▁medical ▁condition ( s ), ▁the ▁tag ▁may ▁have ▁a ▁tele phone ▁number ▁that ▁medical ▁personnel ▁can ▁call ▁for ▁more ▁information , ▁for ▁example ▁that ▁of ▁phys ician , ▁care - g iver ▁or ▁next ▁of ▁kin . ▁Where ▁applicable ▁and ▁provided , ▁the ▁wear er ' s ▁national ▁health ▁service ▁user ▁number ▁can ▁enable ▁access ▁to ▁a ▁more ▁detailed ▁case ▁history . ▁Basically , ▁the ▁medical ▁information ▁tag , ▁eng ra ved ▁with ▁the ▁wear er ' s ▁personal ▁medical ▁problem ▁or ▁history , ▁speak ▁for ▁the ▁wear er ▁when ▁the ▁wear er ▁can ' t . ▁Inc ident ally ▁and ▁where ▁the ▁sympt oms ▁can ▁mis le ad , ▁such ▁a ▁tag ▁may ▁also ▁be ▁useful ▁as ▁evidence ▁of ▁such ▁a ▁condition ▁to ▁law ▁enfor cement ▁personnel . ▁ ▁Types ▁ ▁There ▁are ▁various ▁types ▁of ▁medical ▁ID ▁available . ▁The ▁most ▁common ▁form ▁of ▁medical ▁ID ▁is ▁j ew el ry ▁which ▁provides ▁a ▁logo ▁or ▁ins cription ▁indicating ▁a ▁particular ▁medical ▁condition . ▁These ▁medical ▁identification ▁tags ▁can ▁be ▁made ▁out ▁of ▁st ain less ▁steel ▁( us ually ▁class ified ▁as ▁ 3 1 6 L ▁and ▁known ▁as ▁surg ical ▁st ain less ▁steel ), ▁ster ling ▁silver ▁or ▁gold . ▁If ▁found ▁by ▁emer gency ▁personnel ▁the ▁ins cription ▁provides ▁an ▁indic ation ▁of ▁the ▁wear er ' s ▁special ▁medical ▁needs . ▁Tags ▁are ▁available ▁with ▁pre - eng ra ved ▁conditions ▁or ▁can