Is the product/procedure backed by research?
In today’s world of evidence based medicine research is a key component. If a product or procedure has research standing behind it and there is evidence for its use the likelihood of the procedure being a part of a scope of practice and the chance of third party reimbursement are good.
If there is minimal research then the product/procedure may still have merit. Sometimes vality for use is provided by wide spread use. If many are using it with results even if antidotal then there may be justification for use.
Of course we have to realize that insurance carrier reimbursement is sometime scarce even with research is available. This is often a matter of choice for them as apposed to common sense or good health care.
Ask salesmen for copies and references of research related to there product/service. You are always better off with it than without it.