Neoplasm of uncertain behavior of parathyroid gland

This code signifies a parathyroid gland tumor whose biological behavior cannot be definitively classified as benign or malignant based on current pathological findings. These neoplasms exhibit features that are atypical but do not meet the full criteria for malignancy, requiring further investigation or monitoring.

Assign this code when pathology reports describe a parathyroid lesion as "atypical adenoma," "parathyroid tumor of uncertain malignant potential (PTUMP)," or "parathyroid neoplasm, uncertain behavior." It is appropriate when the pathologist cannot definitively rule out malignancy but also cannot confirm it.

• Do not use this code if the pathology definitively states benign (e.g., adenoma) or malignant (e.g., carcinoma).
• Ensure the documentation explicitly states "uncertain behavior" or similar terminology for the parathyroid gland.
• Sequence this code as a primary diagnosis when the neoplasm is the reason for the encounter, or as a secondary diagnosis if it's an incidental finding being monitored.