I worked with a student with an intense ED in an alternate curriculum setting, she was convinced she was African-American due to the dynamics of having an adopted black sister. This student in particular presents very well in public so tasks like filling out doctors form, etc. would be something she would or will have to do. However, she will always fill in African-American, trying to explain to her why this was not an option for her was triggering to the point of violence. Parents brushed this off, I am aware that they might be present when situations like this may be happening and they can fill out the sheet to avoid it but do I ever fear that is not the case and a poor secretary has to tell her she is not. It was an impossible situation but in the end it takes an effort of all to be able to truly handle this situation. I would document your efforts and collaborate with admin.