Looked into the USB ID sticks but I thought health services are unlikely to plug them in during emergency work. More helpful once you're stable if you've no other ID on you. Even then there will be IT policies safe guarding from virus's etc. A USB could also smash if impacted.
Opted for one like ScotiaLass linked but I've not used it yet.
Think I might go for dog tags with my name, blood group, allergies and ICE contact details, regularly a solo cyclist/motorcyclist if I'm not conscious to tell them they'd never know.