Other hyperfunction of pituitary gland

This code represents conditions where the pituitary gland produces an excessive amount of one or more hormones, excluding those specifically classified elsewhere (e.g., Cushing's disease, acromegaly, hyperprolactinemia). It encompasses various less common or unspecified pituitary hypersecretory states.

Use this code when documentation indicates pituitary hyperfunction that doesn't fit a more specific diagnosis, such as excessive TSH secretion causing hyperthyroidism, or other rare pituitary hormone overproduction. This code is appropriate when the specific hormone involved is identified, but a more precise ICD-10-CM code for that specific hyperfunction does not exist.

• Ensure documentation clearly states "hyperfunction" or "overproduction" of a pituitary hormone, and that it's not a secondary effect of another condition.
• Do not use this code for hyperprolactinemia (E22.1), Cushing's disease (E24.0), or acromegaly/gigantism (E22.0), as these have more specific codes.
• Always look for a more specific code first; this is a residual category for other specified pituitary hyperfunctions.