In My humble opinion, you should get an unbiased Doctor opinion the FIRST time and then if you don't get relief seek a second unbiased opinion. I will only go to the "company Doctor" upon release from my treating physicians and that is to be cleared by them for return to work.
My problem is , my primary physician does not handle worker's comp claims, so I have to find a Doc that does. The Doc that the company used to use as the CD is really fair and treats all patients as he sees the need, not as UPS sees the need. I also always tell the Doc's office that my info can only be shared with the insurance company and other Docs I may need to see for my injury. That way the center manager can't call the Doc and have any input or get any info that I don't approve.