Medical necessity is determined by the needs of the patient, which can be physical or psychological. That's really a standard view in medicine, and thus justifies insurance payments for any required procedures. Examples would be gender reassignment, or plastic surgery.
> Examples would be gender reassignment, or plastic surgery.
Almost nowhere (as far as I'm aware) offers taxpayer-funded plastic surgery, except perhaps in cases of extreme congenital deformation.
I don't think the case presented here is comparable. Many people are sterile, and it doesn't tend to have a cripplingly negative impact on their lives.