Any hyperinsulinemic hypoglycemia in which the cause of the disease is a mutation in the KCNJ11 gene. The disease is MONDO_0011153 (hyperinsulinemic hypoglycemia, familial, 2). Also known as: KCNJ11 hyperinsulinemic hypoglycemia (disease), hyperinsulinemic hypoglycemia (disease) caused by mutation in KCNJ11, hyperinsulinemic hypoglycemia due to Kir6.2 deficiency, hyperinsulinemic hypoglycemia, familial, type 2.