Will I get her in trouble?

I was at the ER last night for a work injury. I was treated by a young med student who, although really nervous, did a great job with me. I was thinking it would be nice to leave a letter for her thanking her and wishing her well in her studies and coming career. Nothing else. I know she's not allowed to date a patient, I'm not leaving any contact information. I just think it would be a nice thing to do for someone working so hard and just starting out in such a demanding profession. Will even leaving the letter at the registration desk cause any trouble for her?