There are a number of different products to help with this.
In addition to the common bracelets and "dog tags" there are ones that contain a USB flash card that can have more detailed information.
But there also ones that can be attached to shoe laces. Runners often use those. They can be as simple as a having an 800 number and a code number to ID the person or again a flash card.
Also you can put in an ICE address in cell phones. ICE - in case of emergency. There you can list phone numbers of doctors and family. While they are not setup for medical information you could put Diabetic or Allergic to penicillin in the address lines.View Thread