Thank you for your question. I think it is great that you trying to be proactive and anticipate your needs for postop pain. For the most part rhinoplasty is associated with minimal amount of pain. Frequently, I will send patients home on just tylenol. A rhinoplasty will not significantly alter your requirements of pain meds. I would meet with your pain management physician prior to surgery. It is probably best if you stick with the pain management doctor that you have had for several years as they have the best understanding of what works for you. Good luck with surgery.
I have performed cosmetic surgery many times on patients with chronic pain and have never had problems. You should ask your plastic surgeon if you can speak to the anesthesiologist to find out what the issues might be for your particular situation. This will help put you at ease and clarify for you what needs to be done. You should not have to see an entirely new pain management specialist in my opinion.
When I have patients on chronic pain medication (and there are lots of them like you) I prefer to have the pain doc regulate their pain meds. Best to have just one doc in control there. Rhinoplasties typically aren't too painful but you may need some extra Norco. Not sure why he would recommend someone else other than your regular doc. Askhim why.
I can see no reason you can't stay on the pain management you are used to through the doctor you already have. Just make sure your anesthesiologist is aware of your medications, and get another rhinoplasty consult from someone who is more willing to work with you.
In general, Rhinoplasty surgery does not hurt. You can feel uncomfortable and stuffy ( due to swelling), but not painful. Usually, if you experience pain, something is wrong. At that point you should contact your Plastic Surgeon. As far as your pain management for your back, be sure to discuss this with the anesthesia department at the hospital/ outpatient center prior to surgery. With proper disclosure of your medical history, you should do fine. Best wishes!