I’ve heard a lot of people looking to get an RFID tag implanted by their doctor eventually run into trouble because their doctors don’t have any kind of release that adequately covers the situation. I’ve been asked about it several times but never had the time to dig one up.
I was just asked again for one because a fellow DIYer is getting noise from his doctor about wanting to see a release of some kind that other DIYers have signed with their doctors. I don’t know of any, so I just wrote a basic one.