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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Endocrine, Nutritional And Metabolic Diseases, And Immunity Disorders 240-279 > Diseases Of Other Endocrine Glands 250-259 > Other Disorders Of Pancreatic Internal Secretion 251.* > 2007 ICD-9-CM Diagnosis 251.9 Unspecified disorder of pancreatic internal secretion This code may be outdated. View the most recent version of ICD-9-CM 251.9 An inherited autosomal recessive syndrome characterized by the disorganized formation of new islets in the PANCREAS and PERSISTENT HYPERINSULINEMIA HYPOGLYCEMIA OF INFANCY. It is due to focal hyperplasia of pancreatic ISLET CELLS budding off from the ductal structures and forming new islets of Langerhans. Mutations in the islet cells involve the potassium channel gene KCNJ11 or the ATP-binding cassette transporter gene ABCC8, both on CHROMOSOME 11. 251.9 is a specific code that can be used to specify a diagnosis 251.9 contains 3 index entries View the ICD-9-CM Volume 1 251.* hierarchy 251.9 also known as: Islet cell hyperplasia NOS Index entries containing 251.9: Disorder - see also Disease pancreas, internal secretion (other than diabetes mellitus) 251.9 specified type NEC 251.8 Hyperplasia, hyperplastic islet cell (pancreatic) 251.9 alpha cells with excess gastrin 251.5 glucagon 251.4 beta cells 251.1 pancreatic islet cells 251.9 alpha with excess gastrin 251.5 glucagon 251.4 beta 251.1