A bit of a spin-off from the unidentified cyclist who died. I read a few people carry a road ID. Does this include health insurance information?

Right now I tuck my drivers license and a credit card in one of my bike bags but I'd like to get a bracelet or something that is easier for a medic to find if I am ever seriously injured. I do have health insurance but have not been carrying that information.

What do you carry and how?