59 years old and have braces for the 3rd time, am I too old to have the orthognathic surgery?

I was told 30 years ago to have surgery but due to military insurance, it didn't happen. The isses of sleep apnea, trouble eating, choking frequently, TMJ, having an open bite and receeding chin have made me consider having the surgery. I have had braces on now for 4 ms. I went to a well respected surgeon and his take was that the risk was too high for him to consider me as a patient. I am looking into a second opinon. Is it possible to have it done for medical reasons or would it be considered cosmetic?

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