Any doctor that says prediabetes can't cause neuropathy does not know what they are talking about, we are not all the same, some full blown diabetics never get neuropathy but others do and the same goes for prediabetics.
Being high borderline on two tests would be a real concern for me, the docs should be telling you to avoid slipping into a full blown diabetic by eating low GI foods & excercise regularly & loose weight if that is an issue.