When riding, we should all have a piece of paper or an ID tag that lists our information and emergency contact info when we run/bike etc. PARTICULARLY if you’re running/biking for distance or when going out by yourself or in a group where you’re not familiar with all the people.
When I run, I have a 3×5 index car in my fanny pack that has:
Emergency contact name and phone
Physician and preferred hospital
Any known medical allergies/issues.
(Additionally I run with my driver’s license, 1 credit card and about $20 in case of emergencies. I bike with more but that’s because I have the paniers)
You could also get one of these: http://www.roadid.com/
I highly suggest by your next ride: at least get a 3×5 index card and put your information on that card. It’s small enough that you can keep in your seat bike bag with your spare tube etc