2006 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.* > 2006 ICD-9-CM Diagnosis 252.00 Hyperparathyroidism, unspecified View the most recent version of ICD-9-CM 252.00 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. 252.00 is a specific code that can be used to specify a diagnosis 252.00 contains 3 index entries View the ICD-9-CM Volume 1 252.* hierarchy  Index entries containing 252.00: Dysfunction parathyroid 252.8 hyperfunction 252.00 Hyperfunction parathyroid (gland) 252.00 Hyperparathyroidism 252.00 ectopic 259.3 other 252.08 primary 252.01 secondary(of renal origin) 588.81 non-renal 252.02 tertiary 252.08