Hyperinsulinemia is a condition in which there are excess levels of insulin circulating in the blood relative to the level of glucose. It is often mistaken for diabetes or hyperglycaemia, ... While hyperinsulinemia is often seen in people with early stage type 2 diabetes mellitus, it is not the cause of the condition and is only one symptom of the disease.
https://en.wikipedia.org/wiki/Hyperinsulinemia