I have a RoadID. Mine looks like this:

Chaos M. Agnet
Town, ST USA
Wife +1(555)555-5555
Medical History
No Known Allergies
Swim, Bike, Run, Beer!

With regard to DOB and SSN, I believe that I'm more at risk from identity theft than I am from a medical provider making some kind of poor treatment decision based on not knowing my SSN or DOB. I happen to know that I'm the only Chaos M. Agnet (or for that matter Chaos Agnet) living in Town, ST. Your medical history or other situation may be different from mine. I would have omitted my last line if I'd had more pertinent information to include.