Ectopic hormone secretion, not elsewhere classified

This code signifies the abnormal production and release of hormones by tissues that are not typically involved in their synthesis, leading to various endocrine disorders. It encompasses situations where a non-endocrine tumor or other non-endocrine tissue secretes hormones, causing systemic effects.

Apply this code when documentation indicates hormone secretion originating from an ectopic source, such as paraneoplastic syndromes where tumors produce hormones like ADH, PTHrP, or erythropoietin. This code is appropriate when the specific ectopic hormone syndrome is not classified elsewhere.

• Ensure the documentation clearly states the ectopic nature of the hormone secretion and rules out other primary endocrine disorders.
• Do not use this code if the condition is specifically identified as ectopic ACTH syndrome (E24.3), as indicated by the Excludes1 note.
• Code the underlying condition (e.g., malignancy) first, followed by this code for the ectopic hormone secretion.