2008 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 > Disorders Of Parathyroid Gland 252.* > 2008 ICD-9-CM Diagnosis 252.0 Hyperparathyroidism  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 252.0 can be accessed here. Abnormally increased activity of the parathyroid glands, which may be primary or secondary (HYPERPARATHYRODISM, SECONDARY). Primary hyperparathyroidism is associated with neoplasia or hyperplasia. The excess of parathyroid hormone leads to alteration in function of bone, renal tubules, and gastrointestinal mucosa. (Dorland, 27th ed) 252.0 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 252.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 252.0 excludes: ectopic hyperparathyroidism (259.3)