Gifts of goodies are always appreciated by medical offices, but I'd avoid boxed chocolates. I remember we used to get so many of them that I got sick of them and still don't eat the boxed ones. A fruit basket would be a great choice.
Be sure not to get anything with monetary value over 25-50 dollars, as most places would not allow the employees to accept these. It's the thought that counts, and a warm, heartfelt note or letter is sometimes as good as anything.
(Not a regular poster on this forum, but I was a recipient of this sort of gift for many years.)