I wear a MedicAlert bracelet that I purchased through the MedicAlert Foundation. I has an ID # with a phone number to the MedicAlert Foundation. With Medic Alert, you have a profile that lists your medical diagnoses, up to 5 contacts (can be Drs), any implantable devices, your meds, advanced directives (organ donor, DNR, etc). You have to purchase the ID (bracelet, necklace, watch, dog tag, shoe tag, etc) through MedicAlert, a well as pay an annual membership fee. Paramedics and First Responders are trained to look for the ID's. When I was in a car accident a few months back, the firefighters were asking me about my MedicAlert while they were assessing me and my injuries. I have other medical conditions in addition to RSD, I should add, which is why I wear it (and wore it before I developed RSD). I never take my bracelet off.
Be well,
Jen