They are probably not UPS employees. Just a subed out company that specializes in getting injured workers back to work. They also look to make sure the doctors don't charge for something they shouldn't, and try to deterime if the employee will be able to return to work. You should ask them what hub they are out of.
There was another post, that I can't find, about these risk management people. From what I remember the advice was to not tell them anything.