Other and unspecified anterior pituitary hyperfunction

This code signifies an overactive anterior pituitary gland, leading to excessive secretion of one or more of its hormones, excluding conditions like Cushing's disease or acromegaly which have their own specific codes. It encompasses a range of endocrine disorders where the anterior pituitary is producing too much of its regulatory hormones, impacting various bodily functions.

Use this code when documentation indicates hyperfunction of the anterior pituitary that is not specifically identified as Cushing's syndrome (due to pituitary ACTH overproduction) or acromegaly/gigantism. This applies to cases of hyperprolactinemia, hyperthyrotropinemia, or other anterior pituitary hormone excesses where a more specific ICD-9 code is unavailable. Documentation should clearly state anterior pituitary hyperfunction and rule out more specific diagnoses.

• Do not use this code for hyperfunction of the posterior pituitary (e.g., SIADH).
• Always look for more specific codes first, such as those for acromegaly (253.0) or Cushing's disease (255.0).
• Ensure the documentation specifies "anterior" pituitary hyperfunction; "pituitary hyperfunction, NOS" would also fall under this code.