Disorders of thyrocalcitonin secretion

This code represents conditions characterized by abnormal secretion of thyrocalcitonin (calcitonin), a hormone primarily involved in calcium regulation. This includes both hypersecretion (excessive production) and hyposecretion (deficient production) of calcitonin, which can impact bone metabolism and serum calcium levels.

Use this code when documentation indicates a specific disorder of calcitonin secretion, such as medullary thyroid carcinoma (which often causes calcitonin hypersecretion) or other endocrine dysfunctions affecting calcitonin levels. Supporting documentation should include laboratory findings of elevated or suppressed calcitonin, along with clinical signs and symptoms.

• Do not use this code for general hypercalcemia or hypocalcemia unless a specific disorder of calcitonin secretion is identified as the underlying cause.
• Always code the underlying cause of the calcitonin secretion disorder, such as medullary thyroid carcinoma, as the primary diagnosis when known.
• Consider sequencing this code after the definitive diagnosis (e.g., malignancy) if the calcitonin disorder is a manifestation or complication of that primary condition.