Should I provide my employer whith medical reccords,for him to verified that my present injury is not a preexisting condition

I was injured at work,I bumped my knee against an electrical conduit.as result of that my knee swelled,Im under company's doctors treatment.
I have a previous medical condition of a similar accident not work related four years ago;now the safety director is asking me to provide him with my medical records of that accident, this year in spring I almost had surgery in my knee to remove fluid from it, wich I have declined because it was'nt bothering me at all.My question is, can the safety director ask me to provide him with my medical records related to my injury 4 years ago.