At one time, the Dellon pre-requisites for consideration and testing to see if one qualifies for the 'Dellon Procedure'..... were in question.
He took no insurance and it seems that just about everyone qualified for his testing procedur, that was costly.
His success rates were for decompression type surgeries only.
Diabetics were the majority of his patients.
He has taken his procedure, taught it, and licensed or franchised it- to surgeons all over the country and has a financial stake in many, if not all of them.
He originated it in Baltimore at Johns Hopkins and had (may still be) an independent and separate office for this. I know that at one time he was no longer affiliated with JHH, but that may have changed recently.
Posts about successes, on this and other BB's seem to be mixed.