The description you give is not suggestive at all of diabetes, the first episode of low sugar with intussception is expected, during sepsis (high white count) and illness in a small 2 yo child who has not eaten it is not unexpected to find a low sugar, the insulin is normal, NOT too low, this insulin level in the face of a sugar of 85 is appropriate and rules out hyperinsulinemia(a cause of low sugar) and makes us feel better in regards to the low sugar that occured earlier. Diabetes is high sugar NOT low, the insulin level is not the diagnosis, rather a child will have sugar in their urine, high sugar in the blood, weight loss, vomiting, ketones in the urine and blood. In many kids during severe illness they can have nonketotic hypoglycemia-which is now being looked at more and more, if there are no more episodes of low sugar then the first episode was due to lack of eating, prolonged fasting on top of a severe illness that led to low fuel supply(glucose) in a toddler. So followup with a pediatrician who is comfortable with these concerns.
Thanks for your patience, the folder is full and so is my clinic! hope this helps