Neoplasm of uncertain behavior of unsp endocrine gland

This code signifies a tumor originating from an endocrine gland (e.g., thyroid, adrenal, pituitary) where the pathologist cannot definitively classify it as benign or malignant based on microscopic examination. It indicates that the biological behavior of the neoplasm is currently indeterminate.

Use this code when pathology reports describe a neoplasm of an endocrine gland as "uncertain behavior," "borderline," or "of unknown malignant potential," and the specific endocrine gland is not documented. This code is appropriate when the physician's documentation reflects the pathologist's findings of an indeterminate tumor.

• Avoid using this code if the specific endocrine gland is identified; instead, use a more precise D44.x code.
• Do not use this code if the neoplasm is definitively diagnosed as benign (D35.x) or malignant (C75.x).
• Always query the provider for clarification if the pathology report indicates "uncertain behavior" but also specifies the endocrine gland.