What does elevated insulin mean?

I just got the insulin panel back and it said it was elevated. I guess normal is below 24 and mine was 31. The letter said we needed to start medication at the follow up visit.
Does this mean I am a diabetic? If I have to much insulin then shouldn’t my sugar levels be low and not high? Two hour after most meals I run about 160 to 250. So I am very confused as to what is going on? Thank you for you help with this.