Can I have a Rhinoplasty done if I have NMO (autoimmune disease)?

Your condition on its own is not- in my opinion- a contra indication to Rhinoplasty. Your specialist who handles your overall medical conditions must clear you completely for any operative procedure.

All forms of immunosuppressive therapy can increase the risk of infection and/or impair wound healing after surgery. So your question is a good one. The answer would come from knowing more about the frequency of these medications, whether you are on them together, what is your blood counts, whether you can be off them for any period of time and what type of rhinoplasty you need. For now all that can be said is to go through the evaluation process and use that information to balance the benefits vs risks of undergoing elective nasal surgery.

Autoimmune disease is not a rigid contraindication to rhinoplasty surgery, but you might be at higher risk for problems if you are taking medication that suppress your immune system. You have to weight the risks and rewards of surgery and discuss this further with the specialist who manages your medical problems.